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    <div style="TEXT-ALIGN: center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">As filed
with the Securities and Exchange Commission on August 4, 2008</font></div>
    <div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Registration
No.&#160;&#160;333- ________</font></div>
      <div style="TEXT-ALIGN: center">
        <hr style="MARGIN-TOP: -5px; COLOR: #000000" noshade size="4">
        <hr style="MARGIN-TOP: -10px; COLOR: #000000" noshade size="1"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 14pt; FONT-FAMILY: Times New Roman">SECURITIES
AND EXCHANGE COMMISSION</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 12pt; FONT-FAMILY: Times New Roman">WASHINGTON,
D.C.&#160;&#160;20549</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 18pt; FONT-FAMILY: Times New Roman">FORM
S-8</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">REGISTRATION
STATEMENT UNDER</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">THE
SECURITIES ACT OF 1933</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">_________________________</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 24pt; FONT-FAMILY: Times New Roman">KNIGHT
TRANSPORTATION, INC.</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(Exact
name of Registrant as specified in its charter)</font></div>
      <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
      <div>
        <table cellpadding="0" cellspacing="0" width="100%">
            <tr>
              <td valign="top" width="49%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Arizona</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">(State)</font></div>
              </td>
              <td valign="top" width="2%"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
              <td valign="top" width="49%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">86-0649974</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">(I.R.S.&#160;&#160;Employer
      Identification No.)</font></div>
              </td>
            </tr>
            <tr>
              <td valign="top" width="49%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">5601
      W.&#160;&#160;Buckeye Rd.</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Phoenix,
      Arizona</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">(Address
      of Principal Executive Offices)</font></div>
              </td>
              <td valign="top" width="2%"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
              <td valign="top" width="49%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">85043</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">(Zip
      Code)</font></div>
              </td>
            </tr>
        </table>
      </div>
      <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">AMENDED
AND RESTATED</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">2003
KNIGHT TRANSPORTATION, INC.</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">STOCK
OPTION PLAN</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(Full
title of the plan)</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">With copy
to:</font></div>
      <div>
        <table cellpadding="0" cellspacing="0" width="100%">
            <tr>
              <td valign="top" width="49%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Kevin
      P.&#160;&#160;Knight</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Chief
      Executive Officer</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Knight
      Transportation, Inc.</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">5601
      West Buckeye Road</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Phoenix,
      Arizona 85043</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">(602)
      269-2000</font></div>
              </td>
              <td valign="top" width="2%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
              <td valign="top" width="49%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">James
      E.&#160;&#160;Brophy, III, Esq.</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Ryley
      Carlock &amp; Applewhite</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Suite
      1200</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">One
      North Central Avenue</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Phoenix,
      Arizona 85004</font></div>
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">(602)
      258-7701</font></div>
              </td>
            </tr>
            <tr>
              <td colspan="3" valign="top" width="100%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">(Name,
      address and telephone number of agent for
  service)</font></div>
              </td>
            </tr>
        </table>
      </div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 27pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Indicate
by check mark whether the registrant is a large accelerated filer, an
accelerated filer, a non-accelerated filer, or a smaller reporting company. See
the definitions of &#8220;accelerated filer,&#8221; &#8220;large accelerated filer,&#8221; and &#8220;smaller
reporting company&#8221; in Rule 12b-2 of the Exchange Act. (Check one):</font></div>
      <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
      <div align="left">
        <table cellpadding="0" cellspacing="0" width="100%">
            <tr>
              <td align="left" valign="top" width="24%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Large
      Accelerated filer&#160;&#160; <font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: wingdings 2, serif">T</font></font></div>
              </td>
              <td valign="top" width="2%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td align="left" valign="top" width="23%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt; TEXT-ALIGN: center" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Accelerated
      filer&#160;&#160;<font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: wingdings 2, serif">&#163;</font></font></div>
              </td>
              <td valign="top" width="2%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td align="left" valign="top" width="23%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt; TEXT-ALIGN: center" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Non-Accelerated
      filer&#160;&#160;<font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: wingdings 2, serif">&#163;</font></font></div>
              </td>
              <td valign="top" width="2%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td align="left" valign="top" width="24%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt; TEXT-ALIGN: right" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Smaller
      reporting company<a name="fis_registration_fee" /><a name="fis_unidentified_table">&#160;&#160;<font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: wingdings 2, serif">&#163;</font></a></font></div>
              </td>
            </tr>
        </table>
      </div>
      <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">CALCULATION
OF REGISTRATION FEE</font></div>
      <div align="left">
        <table cellpadding="0" cellspacing="0" width="100%">
            <tr>
              <td align="left" valign="bottom" style="BORDER-TOP: black 4px double; BORDER-BOTTOM: black 2px solid">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Title
      of securities to be registered</font></div>
              </td>
              <td valign="bottom" style="BORDER-TOP: black 4px double; BORDER-BOTTOM: black 2px solid"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
              <td colspan="2" valign="bottom" style="BORDER-TOP: black 4px double; BORDER-BOTTOM: black 2px solid">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Amount
      to be registered (1)</font></div>
              </td>
              <td align="left" nowrap valign="bottom" style="BORDER-TOP: black 4px double; BORDER-BOTTOM: black 2px solid"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
              <td valign="bottom" style="BORDER-TOP: black 4px double; BORDER-BOTTOM: black 2px solid"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
              <td colspan="2" valign="bottom" style="BORDER-TOP: black 4px double; BORDER-BOTTOM: black 2px solid">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Proposed
      maximum offering price per share (2)</font></div>
              </td>
              <td align="left" nowrap valign="bottom" style="BORDER-TOP: black 4px double; BORDER-BOTTOM: black 2px solid"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
              <td valign="bottom" style="BORDER-TOP: black 4px double; BORDER-BOTTOM: black 2px solid"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
              <td colspan="2" valign="bottom" style="BORDER-TOP: black 4px double; BORDER-BOTTOM: black 2px solid">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Proposed
      maximum aggregate offering price (2)</font></div>
              </td>
              <td align="left" nowrap valign="bottom" style="BORDER-TOP: black 4px double; BORDER-BOTTOM: black 2px solid"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
              <td valign="bottom" style="BORDER-TOP: black 4px double; BORDER-BOTTOM: black 2px solid"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
              <td colspan="2" valign="bottom" style="BORDER-TOP: black 4px double; BORDER-BOTTOM: black 2px solid">
                <div align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Amount
      of registration fee(2)</font></div>
              </td>
              <td align="left" nowrap valign="bottom" style="BORDER-TOP: black 4px double; BORDER-BOTTOM: black 2px solid"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
            </tr>
            <tr bgcolor="#cceeff">
              <td align="left" valign="bottom" width="52%" style="BORDER-BOTTOM: black 4px double">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Common
      stock, par value $.01 per share</font></div>
              </td>
              <td valign="bottom" width="1%" style="BORDER-BOTTOM: black 4px double"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
              <td align="left" valign="bottom" width="1%" style="BORDER-BOTTOM: black 4px double"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
              <td align="right" valign="bottom" width="9%" style="BORDER-BOTTOM: black 4px double"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">3,000,000</font></td>
              <td align="left" nowrap valign="bottom" width="1%" style="BORDER-BOTTOM: black 4px double"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
              <td valign="bottom" width="1%" style="BORDER-BOTTOM: black 4px double"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
              <td align="left" valign="bottom" width="1%" style="BORDER-BOTTOM: black 4px double"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">$</font></td>
              <td align="right" valign="bottom" width="9%" style="BORDER-BOTTOM: black 4px double"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">19.21</font></td>
              <td align="left" nowrap valign="bottom" width="1%" style="BORDER-BOTTOM: black 4px double"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
              <td valign="bottom" width="1%" style="BORDER-BOTTOM: black 4px double"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
              <td align="left" valign="bottom" width="1%" style="BORDER-BOTTOM: black 4px double"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">$</font></td>
              <td align="right" valign="bottom" width="9%" style="BORDER-BOTTOM: black 4px double"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">57,630,000</font></td>
              <td align="left" nowrap valign="bottom" width="1%" style="BORDER-BOTTOM: black 4px double"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
              <td valign="bottom" width="1%" style="BORDER-BOTTOM: black 4px double"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
              <td align="left" valign="bottom" width="1%" style="BORDER-BOTTOM: black 4px double"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">$</font></td>
              <td align="right" valign="bottom" width="9%" style="BORDER-BOTTOM: black 4px double"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">2264.86</font></td>
              <td align="left" nowrap valign="bottom" width="1%" style="BORDER-BOTTOM: black 4px double"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
            </tr>
        </table>
      </div>
      <div>&#160;</div>
      <div>
        <table align="center" border="0" cellpadding="0" cellspacing="0" id="hangingindent" width="100%">
            <tr valign="top">
              <td style="WIDTH: 36pt">
                <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(1)</font></div>
              </td>
              <td>
                <div align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">In
      addition, pursuant to Rule 416 under the Securities Act of 1933, this
      registration statement also covers an indeterminate amount of interests to
      be offered or sold pursuant to the employee benefit plan described herein
      and also covers any additional shares of Common Stock that become issuable
      under the Plan by reason of any stock dividend, stock split,
      recapitalization or similar
transaction.</font></div>
              </td>
            </tr>
        </table>
      </div>
      <div>
        <table align="center" border="0" cellpadding="0" cellspacing="0" id="hangingindent" width="100%">
            <tr valign="top">
              <td style="WIDTH: 36pt">
                <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(2)</font></div>
              </td>
              <td>
                <div align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Estimated
      solely for the purpose of calculating the registration fee, pursuant to
      Rule 457(c) and 457(h) of the Securities Act of 1933, on the basis of the
      average of the high and low prices of the Company's Common Stock on the
      New York Stock Exchange on July 31,
2008.</font></div>
              </td>
            </tr>
        </table>
      </div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
      <div>
        <hr style="MARGIN-TOP: -5px; COLOR: #000000" noshade size="1">
        <hr style="MARGIN-TOP: -13px; COLOR: #000000" noshade size="4">
      </div>
      <div id="PGBRK" style="MARGIN-LEFT: 0pt; WIDTH: 100%; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt">
        <div id="FTR">
          <div id="GLFTR" style="WIDTH: 100%" align="left"><font style="DISPLAY: inline; FONT-SIZE: 8pt; COLOR: #000000; FONT-FAMILY: Times New Roman">&#160;
</font></div>
        </div>
        <div id="PN" style="PAGE-BREAK-AFTER: always">
          <div style="WIDTH: 100%; TEXT-ALIGN: center">
          </div>
          <div style="WIDTH: 100%; TEXT-ALIGN: center">
            <hr style="COLOR: black" noshade size="2">
          </div>
        </div>
        <div id="HDR">
          <div id="GLHDR" style="WIDTH: 100%" align="right"><font style="DISPLAY: inline; FONT-SIZE: 8pt; COLOR: #000000; FONT-FAMILY: Times New Roman">&#160;
</font></div>
        </div>
      </div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">PART
II &#8211; INFORMATION REQUIRED IN THE REGISTRATION STATEMENT</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">ITEM
3:&#160;&#160;INCORPORATION OF DOCUMENTS BY REFERENCE</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Knight
Transportation, Inc. (the &#8220;Registrant&#8221;) has prepared this Registration Statement
in accordance with the requirements of Form S-8 under the Securities Act of 1933
(the &#8220;Securities Act&#8221;) to increase by 3,000,000 the number of shares registered
under the 2003 Knight Transportation, Inc. Stock Option
Plan.&#160;&#160;Pursuant to General Instruction E of Form S-8, the contents of
the previous Registration Statement on Form S-8 (File No. 333-126601) filed by
Knight Transportation, Inc. with the Securities and Exchange Commission (&#8220;SEC&#8221;)
on July 14, 2005 (&#8220;Previous Form S-8&#8221;), including all periodic reports that the
Registrant filed after the Previous Form S-8, are hereby incorporated by
reference in this Registration Statement.&#160;&#160;Pursuant to Rule 429 under
the Securities Act, this Registration Statement also amends the information
contained in earlier Registration Statements relating to the Knight
Transportation, Inc. Stock Option Plan (Registration Statement No. 333-105718,
filed on May 30, 2003), and the Registration Statement on Form S-8 filed July
14, 2005 (File No. 333-126601).&#160;&#160;The documents listed in paragraphs
(a) through (d) below are incorporated herein by reference.</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
      <div>
        <table align="center" border="0" cellpadding="0" cellspacing="0" id="hangingindent" width="100%">
            <tr valign="top">
              <td style="WIDTH: 36pt">
                <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(a)</font></div>
              </td>
              <td>
                <div align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">The
      Registrant&#8217;s Annual Report on Form 10-K for the fiscal year ended December
      31, 2007, filed with the SEC on February 29, 2008;
  and</font></div>
              </td>
            </tr>
        </table>
      </div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
      <div>
        <table align="center" border="0" cellpadding="0" cellspacing="0" id="hangingindent" width="100%">
            <tr valign="top">
              <td style="WIDTH: 36pt">
                <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(b)</font></div>
              </td>
              <td>
                <div align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">All
      other reports filed by the Registrant pursuant to Section 13(a) or 15(d)
      of the Exchange Act since the end of the fiscal year covered by
      Registrant&#8217;s Annual Report on Form 10-K for the year ended December 31,
      2007.</font></div>
              </td>
            </tr>
        </table>
      </div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
      <div>
        <table align="center" border="0" cellpadding="0" cellspacing="0" id="hangingindent" width="100%">
            <tr valign="top">
              <td style="WIDTH: 36pt">
                <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(c)</font></div>
              </td>
              <td>
                <div align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">See
      the description of our Common Stock contained in our Registration on Form
      S-3, File No. 33-72130, filed with the Securities and Exchange Commission
      October 24, 2001;</font></div>
              </td>
            </tr>
        </table>
      </div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
      <div>
        <table align="center" border="0" cellpadding="0" cellspacing="0" id="hangingindent" width="100%">
            <tr valign="top">
              <td style="WIDTH: 36pt">
                <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(d)</font></div>
              </td>
              <td>
                <div align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">All
      reports and definitive proxy or information statements filed pursuant to
      Section 13(a), 13(c), 14 or 15(d) of the Exchange Act after the date of
      this Registration Statement and prior to the filing of a post-effective
      amendment which indicate that all securities offered hereby have been sold
      or which deregister all securities then remaining unsold, shall be deemed
      to be incorporated by reference into this Registration Statement and to be
      made a part hereof from the date of the filing of such
      documents.&#160;&#160;Any statement contained in a document incorporated
      or deemed to be incorporated by reference herein shall be deemed to be
      modified or superseded for purposes of this Registration Statement to the
      extent that a statement contained in any subsequently filed document,
      which is also deemed to be incorporated by reference herein, modifies or
      supersedes such statement.</font></div>
              </td>
            </tr>
        </table>
      </div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">In
accordance with the instructions to Form S-8, the required legal opinions and
consents are attached hereto.</font></div><br>
      <div id="PGBRK" style="MARGIN-LEFT: 0pt; WIDTH: 100%; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt">
        <div id="FTR">
          <div id="GLFTR" style="WIDTH: 100%" align="left"><font style="DISPLAY: inline; FONT-SIZE: 8pt; COLOR: #000000; FONT-FAMILY: Times New Roman">&#160;
</font></div>
        </div>
        <div id="PN" style="PAGE-BREAK-AFTER: always">
          <div style="WIDTH: 100%; TEXT-ALIGN: center"><font style="DISPLAY: inline; FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman">-2-</font></div>
          <div style="WIDTH: 100%; TEXT-ALIGN: center">
            <hr style="COLOR: black" noshade size="2">
          </div>
        </div>
        <div id="HDR">
          <div id="GLHDR" style="WIDTH: 100%" align="right"><font style="DISPLAY: inline; FONT-SIZE: 8pt; COLOR: #000000; FONT-FAMILY: Times New Roman">&#160;
</font></div>
        </div>
      </div><br>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Item
8.&#160;&#160;<font style="DISPLAY: inline; TEXT-DECORATION: underline">Exhibits.</font></font></div>
      <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
      <div align="left">
        <table cellpadding="0" cellspacing="0" width="100%">
            <tr>
              <td valign="top" width="6%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Exhibit
      Number</font></div>
              </td>
              <td valign="top" width="2%"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
              <td valign="top" width="92%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            </tr>
            <tr bgcolor="#cceeff">
              <td valign="top" width="6%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">4.1
      (1)</font></div>
              </td>
              <td valign="top" width="2%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
              <td valign="top" width="92%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Second
      Amended and Restated Articles of Incorporation</font></div>
              </td>
            </tr>
            <tr bgcolor="white">
              <td valign="top" width="6%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">4.2
      (2)</font></div>
              </td>
              <td valign="top" width="2%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
              <td valign="top" width="92%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Sixth
      Amended and Restated Bylaws</font></div>
              </td>
            </tr>
            <tr bgcolor="#cceeff">
              <td valign="top" width="6%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">4.3
      (3)</font></div>
              </td>
              <td valign="top" width="2%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
              <td valign="top" width="92%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Knight
      Transportation, Inc. Amended and Restated 2003 Stock Option
      Plan</font></div>
              </td>
            </tr>
            <tr bgcolor="white">
              <td valign="top" width="6%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">4.4</font></div>
              </td>
              <td valign="top" width="2%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
              <td valign="top" width="92%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">First
      Amendment to the Knight Transportation, Inc. Amended and Restated 2003
      Option Plan</font></div>
              </td>
            </tr>
            <tr bgcolor="#cceeff">
              <td valign="top" width="6%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">4.5
      (4)</font></div>
              </td>
              <td valign="top" width="2%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
              <td valign="top" width="92%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Second
      Amendment to the Knight Transportation, Inc. Amended and Restated 2003
      Stock Option Plan</font></div>
              </td>
            </tr>
            <tr bgcolor="white">
              <td valign="top" width="6%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">5.1</font></div>
              </td>
              <td valign="top" width="2%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
              <td valign="top" width="92%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Opinion
      of Ryley Carlock &amp; Applewhite, a professional
    association</font></div>
              </td>
            </tr>
            <tr bgcolor="#cceeff">
              <td valign="top" width="6%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">23.1</font></div>
              </td>
              <td valign="top" width="2%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
              <td valign="top" width="92%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Consent
      of Ryley Carlock &amp; Applewhite, a professional association (see Exhibit
      5.1)</font></div>
              </td>
            </tr>
            <tr bgcolor="white">
              <td valign="top" width="6%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">23.2</font></div>
              </td>
              <td valign="top" width="2%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
              <td valign="top" width="92%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Consent
      of Deloitte &amp; Touche, LLP, independent public
    accountants</font></div>
              </td>
            </tr>
        </table>
      </div>
      <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
      <div>
        <table align="center" border="0" cellpadding="0" cellspacing="0" id="hangingindent" width="100%">
            <tr valign="top">
              <td style="WIDTH: 36pt">
                <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(1)</font></div>
              </td>
              <td>
                <div align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Incorporated
      by reference to the Registrant&#8217;s Definitive Proxy Statement on Schedule
      14A filed on April 20, 2007.</font></div>
              </td>
            </tr>
        </table>
      </div>
      <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
      <div>
        <table align="center" border="0" cellpadding="0" cellspacing="0" id="hangingindent" width="100%">
            <tr valign="top">
              <td style="WIDTH: 36pt">
                <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(2)</font></div>
              </td>
              <td>
                <div align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Incorporated
      by reference to the Registrant&#8217;s Report on Form 8-K dated December 18,
      2007 and filed on December 19,
2007.</font></div>
              </td>
            </tr>
        </table>
      </div>
      <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
      <div>
        <table align="center" border="0" cellpadding="0" cellspacing="0" id="hangingindent" width="100%">
            <tr valign="top">
              <td style="WIDTH: 36pt">
                <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(3)</font></div>
              </td>
              <td>
                <div align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Incorporated
      by reference to the Registrant&#8217;s Definitive Proxy Statement on Schedule
      14A filed on December 1, 2005.</font></div>
              </td>
            </tr>
        </table>
      </div>
      <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
      <div>
        <table align="center" border="0" cellpadding="0" cellspacing="0" id="hangingindent" width="100%">
            <tr valign="top">
              <td style="WIDTH: 36pt">
                <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(4)</font></div>
              </td>
              <td>
                <div align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Incorporated
      by reference to the&#160;&#160;Registrant&#8217;s Definitive Proxy Statement on
      Schedule 14A filed on April 11,
2008.</font></div>
              </td>
            </tr>
        </table>
      </div><br>
      <div id="PGBRK" style="MARGIN-LEFT: 0pt; WIDTH: 100%; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt">
        <div id="FTR">
          <div id="GLFTR" style="WIDTH: 100%" align="left"><font style="DISPLAY: inline; FONT-SIZE: 8pt; COLOR: #000000; FONT-FAMILY: Times New Roman">&#160;
</font></div>
        </div>
        <div id="PN" style="PAGE-BREAK-AFTER: always">
          <div style="WIDTH: 100%; TEXT-ALIGN: center"><font style="DISPLAY: inline; FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman">-3-</font></div>
          <div style="WIDTH: 100%; TEXT-ALIGN: center">
            <hr style="COLOR: black" noshade size="2">
          </div>
        </div>
        <div id="HDR">
          <div id="GLHDR" style="WIDTH: 100%" align="right"><font style="DISPLAY: inline; FONT-SIZE: 8pt; COLOR: #000000; FONT-FAMILY: Times New Roman">&#160;
</font></div>
        </div>
      </div><br>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">SIGNATURES</font></div>
      <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 36pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><font style="DISPLAY: inline; TEXT-DECORATION: underline">THE
REGISTRANT</font>.&#160;&#160;Pursuant to the requirements of the Securities Act
of 1933, the Registrant certifies that it has reasonable grounds to believe that
it meets all of the requirements for filing on Form S-8 and has duly caused this
Registration Statement to be signed on its behalf by the undersigned, thereunto
duly authorized, in the City of Phoenix, State of Arizona, on this 4th day of
August, 2008.</font></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 36pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
      <div align="left">
        <table cellpadding="0" cellspacing="0" width="100%">
            <tr>
              <td valign="top" width="50%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td colspan="2" valign="top" width="50%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">KNIGHT
      TRANSPORTATION, INC., an Arizona corporation</font></div>
              </td>
            </tr>
            <tr>
              <td valign="top" width="50%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="3%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="47%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            </tr>
            <tr>
              <td valign="top" width="50%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="3%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">By</font></div>
              </td>
              <td valign="top" width="47%" style="BORDER-BOTTOM: black 2px solid">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"><font style="DISPLAY: inline">/s/ Kevin P. Knight</font></font></div>
              </td>
            </tr>
            <tr>
              <td valign="top" width="50%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="3%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td align="left" valign="top" width="47%">
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              </td>
            </tr>
            <tr>
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              <td valign="top" width="47%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
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            </tr>
            <tr>
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              <td align="left" valign="top" width="3%">
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            </tr>
            <tr>
              <td valign="top" width="50%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="3%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
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              <td align="left" valign="top" width="47%">
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              </td>
            </tr>
        </table>
      </div>
      <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
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to the requirements of the Securities Act of 1933, this Registration Statement
has been signed by the following persons in the capacities and on the date
indicated.</font></div>
      <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
      <div align="left">
        <table cellpadding="0" cellspacing="0" width="100%">
            <tr>
              <td valign="top" width="50%">
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              </td>
              <td valign="top" width="25%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
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              <td valign="top" width="25%">
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              </td>
            </tr>
            <tr>
              <td valign="top" width="50%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="25%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="25%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            </tr>
            <tr>
              <td valign="top" width="50%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="25%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="25%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            </tr>
            <tr>
              <td align="left" valign="top" width="50%" style="BORDER-BOTTOM: black 2px solid">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"><font style="DISPLAY: inline">/s/ Kevin P. Knight</font></font></div>
              </td>
              <td valign="top" width="25%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="25%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt; TEXT-ALIGN: right" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">August
      4, 2008</font></div>
              </td>
            </tr>
            <tr>
              <td align="left" valign="top" width="50%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Chairman
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              </td>
              <td valign="top" width="25%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="25%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            </tr>
            <tr>
              <td align="left" valign="top" width="50%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Chief
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              </td>
              <td valign="top" width="25%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="25%">
                <div><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></div>
              </td>
            </tr>
            <tr>
              <td valign="top" width="50%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="25%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="25%">
                <div><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></div>
              </td>
            </tr>
            <tr>
              <td align="left" valign="top" width="50%" style="BORDER-BOTTOM: black 2px solid">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"><font style="DISPLAY: inline">/s/ Gary J. Knight</font></font></div>
              </td>
              <td valign="top" width="25%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="25%">
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      4, 2008</font></div>
              </td>
            </tr>
            <tr>
              <td align="left" valign="top" width="50%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Vice
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              </td>
              <td valign="top" width="25%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="25%">
                <div><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></div>
              </td>
            </tr>
            <tr>
              <td valign="top" width="50%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="25%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="25%">
                <div><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></div>
              </td>
            </tr>
            <tr>
              <td valign="top" width="50%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="25%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="25%">
                <div><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></div>
              </td>
            </tr>
            <tr>
              <td align="left" valign="top" width="50%" style="BORDER-BOTTOM: black 2px solid">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"><font style="DISPLAY: inline">/s/ Randy Knight</font></font></div>
              </td>
              <td valign="top" width="25%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="25%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt; TEXT-ALIGN: right" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">August
      4, 2008</font></div>
              </td>
            </tr>
            <tr>
              <td align="left" valign="top" width="50%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Director</font></div>
              </td>
              <td valign="top" width="25%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="25%">
                <div><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></div>
              </td>
            </tr>
            <tr>
              <td valign="top" width="50%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="25%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="25%">
                <div><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></div>
              </td>
            </tr>
            <tr>
              <td valign="top" width="50%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="25%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="25%">
                <div><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></div>
              </td>
            </tr>
            <tr>
              <td align="left" valign="top" width="50%" style="BORDER-BOTTOM: black 2px solid">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"><font style="DISPLAY: inline">/s/ G.D. Madden</font></font></div>
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              <td valign="top" width="25%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="25%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt; TEXT-ALIGN: right" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">August
      4, 2008</font></div>
              </td>
            </tr>
            <tr>
              <td align="left" valign="top" width="50%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Director</font></div>
              </td>
              <td valign="top" width="25%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="25%">
                <div><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></div>
              </td>
            </tr>
            <tr>
              <td valign="top" width="50%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="25%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="25%">
                <div><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></div>
              </td>
            </tr>
            <tr>
              <td valign="top" width="50%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="25%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="25%">
                <div><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></div>
              </td>
            </tr>
            <tr>
              <td align="left" valign="top" width="50%" style="BORDER-BOTTOM: black 2px solid">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"><font style="DISPLAY: inline">/s/ Kathryn Munro</font></font></div>
              </td>
              <td valign="top" width="25%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="25%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt; TEXT-ALIGN: right" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">August
      4, 2008</font></div>
              </td>
            </tr>
            <tr>
              <td align="left" valign="top" width="50%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Director</font></div>
              </td>
              <td valign="top" width="25%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="25%">
                <div><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></div>
              </td>
            </tr>
            <tr>
              <td valign="top" width="50%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="25%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="25%">
                <div><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></div>
              </td>
            </tr>
            <tr>
              <td valign="top" width="50%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="25%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="25%">
                <div><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></div>
              </td>
            </tr>
            <tr>
              <td align="left" valign="top" width="50%" style="BORDER-BOTTOM: black 2px solid">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"><font style="DISPLAY: inline">/s/ Richard Lehmann</font></font></div>
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              <td valign="top" width="25%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="25%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt; TEXT-ALIGN: right" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">August
      4, 2008</font></div>
              </td>
            </tr>
            <tr>
              <td align="left" valign="top" width="50%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Director</font></div>
              </td>
              <td valign="top" width="25%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="25%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            </tr>
            <tr>
              <td align="left" valign="top" width="50%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
              <td valign="top" width="25%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
              <td valign="top" width="25%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
            </tr>
            <tr>
              <td align="left" valign="top" width="50%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
              <td valign="top" width="25%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
              <td valign="top" width="25%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
            </tr>
            <tr>
              <td align="left" valign="top" width="50%" style="BORDER-BOTTOM: black 2px solid"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">/s/
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              <td valign="top" width="25%" style="PADDING-BOTTOM: 2px">
                <div style="TEXT-ALIGN: right"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">August
      4, 2008</font></font></div>
              </td>
            </tr>
            <tr>
              <td align="left" valign="top" width="50%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Director</font></td>
              <td valign="top" width="25%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
              <td valign="top" width="25%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
            </tr>
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      <div id="PGBRK" style="MARGIN-LEFT: 0pt; WIDTH: 100%; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt">
        <div id="FTR">
          <div id="GLFTR" style="WIDTH: 100%" align="left"><font style="DISPLAY: inline; FONT-SIZE: 8pt; COLOR: #000000; FONT-FAMILY: Times New Roman">&#160;
</font></div>
        </div>
        <div id="PN" style="PAGE-BREAK-AFTER: always">
          <div style="WIDTH: 100%; TEXT-ALIGN: center"><font style="DISPLAY: inline; FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman">-4-</font></div>
          <div style="WIDTH: 100%; TEXT-ALIGN: center">
            <hr style="COLOR: black" noshade size="2">
          </div>
        </div>
        <div id="HDR">
          <div id="GLHDR" style="WIDTH: 100%" align="right"><font style="DISPLAY: inline; FONT-SIZE: 8pt; COLOR: #000000; FONT-FAMILY: Times New Roman">&#160;
</font></div>
        </div>
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      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><font style="DISPLAY: inline; TEXT-DECORATION: underline">EXHIBIT
INDEX</font></font></div>
      <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
      <div align="left">
        <table cellpadding="0" cellspacing="0" width="100%">
            <tr>
              <td align="left" valign="bottom" width="10%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"><font style="DISPLAY: inline; TEXT-DECORATION: underline">Exhibit
      No.</font></font></div>
              </td>
              <td valign="top" width="2%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="bottom" width="71%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"><font style="DISPLAY: inline; TEXT-DECORATION: underline">Description</font></font></div>
              </td>
              <td valign="top" width="2%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td align="left" valign="bottom" width="15%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"><font style="TEXT-DECORATION: underline">Sequentially <font style="DISPLAY: inline; TEXT-DECORATION: underline">Numbered Pages</font>
      <font style="DISPLAY: inline; FONT-SIZE: 70%; VERTICAL-ALIGN: super; TEXT-DECORATION: underline">(1)</font></font></font></div>
              </td>
            </tr>
            <tr>
              <td valign="top" width="10%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="2%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="71%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="2%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="15%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            </tr>
            <tr bgcolor="#cceeff">
              <td align="left" valign="top" width="10%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">4.1</font></div>
              </td>
              <td valign="top" width="2%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td align="left" valign="top" width="71%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Second
      Amended and Restated Articles of Incorporation.&#160;&#160;(Incorporated
      by reference to the Registrant&#8217;s Definitive Proxy Statement on Schedule
      14A filed on April 20, 2007)</font></div>
              </td>
              <td valign="top" width="2%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="15%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            </tr>
            <tr bgcolor="white">
              <td valign="top" width="10%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="2%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="71%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="2%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="15%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            </tr>
            <tr bgcolor="#cceeff">
              <td align="left" valign="top" width="10%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">4.2</font></div>
              </td>
              <td valign="top" width="2%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td align="left" valign="top" width="71%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Sixth
      Amended and Restated Bylaws.&#160;&#160;(Incorporated by reference to the
      Registrant&#8217;s Report on Form 8-K dated December 18, 2007 and filed on
      December 19, 2007)</font></div>
              </td>
              <td valign="top" width="2%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="15%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            </tr>
            <tr bgcolor="white">
              <td valign="top" width="10%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="2%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="71%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="2%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="15%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            </tr>
            <tr bgcolor="#cceeff">
              <td align="left" valign="top" width="10%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">4.3</font></div>
              </td>
              <td valign="top" width="2%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td align="left" valign="top" width="71%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Knight
      Transportation, Inc. Amended and Restated 2003 Stock Option
      Plan.&#160;&#160;(Incorporated by reference to the Registrant&#8217;s Definitive
      Proxy Statement on Schedule 14A filed December 1, 2005)</font></div>
              </td>
              <td valign="top" width="2%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="15%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            </tr>
            <tr bgcolor="white">
              <td valign="top" width="10%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="2%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="71%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="2%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="15%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            </tr>
            <tr bgcolor="#cceeff">
              <td align="left" valign="top" width="10%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"><a href="ex4_4.htm">4.4*</a></font></div>
              </td>
              <td valign="top" width="2%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td align="left" valign="top" width="71%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">First
      Amendment to the Knight Transportation, Inc. Amended and Restated 2003
      Stock Option Plan</font></div>
              </td>
              <td valign="top" width="2%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="15%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            </tr>
            <tr bgcolor="white">
              <td valign="top" width="10%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="2%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="71%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="2%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="15%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            </tr>
            <tr bgcolor="#cceeff">
              <td align="left" valign="top" width="10%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">4.5</font></div>
              </td>
              <td valign="top" width="2%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td align="left" valign="top" width="71%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Second
      Amendment to the Knight Transportation, Inc. Amended and Restated 2003
      Stock Option Plan (Incorporated by reference to
      the&#160;&#160;Registrant&#8217;s Definitive Proxy Statement on Schedule 14A
      filed on April 11, 2008.)</font></div>
              </td>
              <td valign="top" width="2%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="15%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            </tr>
            <tr bgcolor="white">
              <td valign="top" width="10%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="2%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="71%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="2%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="15%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            </tr>
            <tr bgcolor="#cceeff">
              <td align="left" valign="top" width="10%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"><a href="ex5_1.htm">5.1*</a></font></div>
              </td>
              <td valign="top" width="2%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td align="left" valign="top" width="71%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Opinion
      of Ryley Carlock &amp; Applewhite, a professional
    association</font></div>
              </td>
              <td valign="top" width="2%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="15%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            </tr>
            <tr bgcolor="white">
              <td valign="top" width="10%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="2%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="71%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="2%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="15%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            </tr>
            <tr bgcolor="#cceeff">
              <td align="left" valign="top" width="10%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"><a href="ex23_1.htm">23.1*</a></font></div>
              </td>
              <td valign="top" width="2%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td align="left" valign="top" width="71%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Consent
      of Ryley Carlock &amp; Applewhite, a professional association (see Exhibit
      5.1)</font></div>
              </td>
              <td valign="top" width="2%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="15%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            </tr>
            <tr bgcolor="white">
              <td valign="top" width="10%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="2%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="71%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="2%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="15%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            </tr>
            <tr bgcolor="#cceeff">
              <td align="left" valign="top" width="10%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"><a href="ex23_2.htm">23.2*</a></font></div>
              </td>
              <td valign="top" width="2%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td align="left" valign="top" width="71%">
                <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Consent
      of Deloitte &amp; Touche LLP, independent public
    accountants</font></div>
              </td>
              <td valign="top" width="2%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
              <td valign="top" width="15%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            </tr>
        </table>
      </div>
      <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">* Filed
herewith.</font></div>
      <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><font style="DISPLAY: inline; FONT-SIZE: 70%; VERTICAL-ALIGN: super; TEXT-DECORATION: underline">1/</font>
The page numbers where exhibits (other than those incorporated by reference) may
be found are indicated only on the manually signed Registration
Statement.</font></div>
    </div>
    <div>&#160;</div>
    <div>&#160;</div>
    <div style="TEXT-ALIGN: center"><font style="FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman">-5-</font></div>
    <div>
      <hr style="COLOR: black" align="left" noshade size="2" width="100%">
    </div>
  </body>
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{"company-data": {"conformed-name": "KNIGHT TRANSPORTATION INC", "cik": "0000929452", "assigned-sic": "4213", "irs-number": "860649974", "state-of-incorporation": "AZ", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "S-8", "act": "33", "file-number": "333-152756", "film-number": "08988960"}, "business-address": {"street1": "5601 W BUCKEYE RD", "city": "PHOENIX", "state": "AZ", "zip": "85043", "phone": "6022692000"}, "mail-address": {"street1": "5601 W BUCKEYE RD", "city": "PHOENIX", "state": "AZ", "zip": "85043"}}
forms8.htm
As filed
with the Securities and Exchange Commission on August 4, 2008
Registration
No.  333- ________
SECURITIES
AND EXCHANGE COMMISSION
WASHINGTON,
D.C.  20549
FORM
S-8
REGISTRATION
STATEMENT UNDER
THE
SECURITIES ACT OF 1933
_________________________
KNIGHT
TRANSPORTATION, INC.
(Exact
name of Registrant as specified in its charter)
Arizona
(State)
86-0649974
(I.R.S.  Employer
      Identification No.)
5601
      W.  Buckeye Rd.
Phoenix,
      Arizona
(Address
      of Principal Executive Offices)
85043
(Zip
      Code)
AMENDED
AND RESTATED
2003
KNIGHT TRANSPORTATION, INC.
STOCK
OPTION PLAN
(Full
title of the plan)
With copy
to:
Kevin
      P.  Knight
Chief
      Executive Officer
Knight
      Transportation, Inc.
5601
      West Buckeye Road
Phoenix,
      Arizona 85043
(602)
      269-2000
James
      E.  Brophy, III, Esq.
Ryley
      Carlock & Applewhite
Suite
      1200
One
      North Central Avenue
Phoenix,
      Arizona 85004
(602)
      258-7701
(Name,
      address and telephone number of agent for
  service)
Indicate
by check mark whether the registrant is a large accelerated filer, an
accelerated filer, a non-accelerated filer, or a smaller reporting company. See
the definitions of "accelerated filer," "large accelerated filer," and "smaller
reporting company" in Rule 12b-2 of the Exchange Act. (Check one):
Large
      Accelerated filer
T
Accelerated
      filer
£
Non-Accelerated
      filer
£
Smaller
      reporting company
£
CALCULATION
OF REGISTRATION FEE
Title
      of securities to be registered
Amount
      to be registered (1)
Proposed
      maximum offering price per share (2)
Proposed
      maximum aggregate offering price (2)
Amount
      of registration fee(2)
Common
      stock, par value $.01 per share
3,000,000
$
19.21
$
57,630,000
$
2264.86
(1)
In
      addition, pursuant to Rule 416 under the Securities Act of 1933, this
      registration statement also covers an indeterminate amount of interests to
      be offered or sold pursuant to the employee benefit plan described herein
      and also covers any additional shares of Common Stock that become issuable
      under the Plan by reason of any stock dividend, stock split,
      recapitalization or similar
transaction.
(2)
Estimated
      solely for the purpose of calculating the registration fee, pursuant to
      Rule 457(c) and 457(h) of the Securities Act of 1933, on the basis of the
      average of the high and low prices of the Company's Common Stock on the
      New York Stock Exchange on July 31,
2008.
PART
II – INFORMATION REQUIRED IN THE REGISTRATION STATEMENT
ITEM
3:  INCORPORATION OF DOCUMENTS BY REFERENCE
Knight
Transportation, Inc. (the "Registrant") has prepared this Registration Statement
in accordance with the requirements of Form S-8 under the Securities Act of 1933
(the "Securities Act") to increase by 3,000,000 the number of shares registered
under the 2003 Knight Transportation, Inc. Stock Option
Plan.  Pursuant to General Instruction E of Form S-8, the contents of
the previous Registration Statement on Form S-8 (File No. 333-126601) filed by
Knight Transportation, Inc. with the Securities and Exchange Commission ("SEC")
on July 14, 2005 ("Previous Form S-8"), including all periodic reports that the
Registrant filed after the Previous Form S-8, are hereby incorporated by
reference in this Registration Statement.  Pursuant to Rule 429 under
the Securities Act, this Registration Statement also amends the information
contained in earlier Registration Statements relating to the Knight
Transportation, Inc. Stock Option Plan (Registration Statement No. 333-105718,
filed on May 30, 2003), and the Registration Statement on Form S-8 filed July
14, 2005 (File No. 333-126601).  The documents listed in paragraphs
(a) through (d) below are incorporated herein by reference.
(a)
The
      Registrant's Annual Report on Form 10-K for the fiscal year ended December
      31, 2007, filed with the SEC on February 29, 2008;
  and
(b)
All
      other reports filed by the Registrant pursuant to Section 13(a) or 15(d)
      of the Exchange Act since the end of the fiscal year covered by
      Registrant's Annual Report on Form 10-K for the year ended December 31,
      2007.
(c)
See
      the description of our Common Stock contained in our Registration on Form
      S-3, File No. 33-72130, filed with the Securities and Exchange Commission
      October 24, 2001;
(d)
All
      reports and definitive proxy or information statements filed pursuant to
      Section 13(a), 13(c), 14 or 15(d) of the Exchange Act after the date of
      this Registration Statement and prior to the filing of a post-effective
      amendment which indicate that all securities offered hereby have been sold
      or which deregister all securities then remaining unsold, shall be deemed
      to be incorporated by reference into this Registration Statement and to be
      made a part hereof from the date of the filing of such
      documents.  Any statement contained in a document incorporated
      or deemed to be incorporated by reference herein shall be deemed to be
      modified or superseded for purposes of this Registration Statement to the
      extent that a statement contained in any subsequently filed document,
      which is also deemed to be incorporated by reference herein, modifies or
      supersedes such statement.
In
accordance with the instructions to Form S-8, the required legal opinions and
consents are attached hereto.
-2-
Item
8.
Exhibits.
Exhibit
      Number
4.1
      (1)
Second
      Amended and Restated Articles of Incorporation
4.2
      (2)
Sixth
      Amended and Restated Bylaws
4.3
      (3)
Knight
      Transportation, Inc. Amended and Restated 2003 Stock Option
      Plan
4.4
First
      Amendment to the Knight Transportation, Inc. Amended and Restated 2003
      Option Plan
4.5
      (4)
Second
      Amendment to the Knight Transportation, Inc. Amended and Restated 2003
      Stock Option Plan
5.1
Opinion
      of Ryley Carlock & Applewhite, a professional
    association
23.1
Consent
      of Ryley Carlock & Applewhite, a professional association (see Exhibit
      5.1)
23.2
Consent
      of Deloitte & Touche, LLP, independent public
    accountants
(1)
Incorporated
      by reference to the Registrant's Definitive Proxy Statement on Schedule
      14A filed on April 20, 2007.
(2)
Incorporated
      by reference to the Registrant's Report on Form 8-K dated December 18,
      2007 and filed on December 19,
2007.
(3)
Incorporated
      by reference to the Registrant's Definitive Proxy Statement on Schedule
      14A filed on December 1, 2005.
(4)
Incorporated
      by reference to the  Registrant's Definitive Proxy Statement on
      Schedule 14A filed on April 11,
2008.
-3-
SIGNATURES
THE
REGISTRANT
.  Pursuant to the requirements of the Securities Act
of 1933, the Registrant certifies that it has reasonable grounds to believe that
it meets all of the requirements for filing on Form S-8 and has duly caused this
Registration Statement to be signed on its behalf by the undersigned, thereunto
duly authorized, in the City of Phoenix, State of Arizona, on this 4th day of
August, 2008.
KNIGHT
      TRANSPORTATION, INC., an Arizona corporation
By
/s/ Kevin P. Knight
Chairman
      of the Board and Chief Executive Officer
By
/s/ David Jackson
Chief
      Financial Officer
Pursuant
to the requirements of the Securities Act of 1933, this Registration Statement
has been signed by the following persons in the capacities and on the date
indicated.
Signature and
      Title
Date
/s/ Kevin P. Knight
August
      4, 2008
Chairman
      of the Board,
Chief
      Executive Officer, Director
/s/ Gary J. Knight
August
      4, 2008
Vice
      Chairman, Director
/s/ Randy Knight
August
      4, 2008
Director
/s/ G.D. Madden
August
      4, 2008
Director
/s/ Kathryn Munro
August
      4, 2008
Director
/s/ Richard Lehmann
August
      4, 2008
Director
/s/
      Michael Garnreiter
August
      4, 2008
Director
-4-
EXHIBIT
INDEX
Exhibit
      No.
Description
Sequentially
Numbered Pages
(1)
4.1
Second
      Amended and Restated Articles of Incorporation.  (Incorporated
      by reference to the Registrant's Definitive Proxy Statement on Schedule
      14A filed on April 20, 2007)
4.2
Sixth
      Amended and Restated Bylaws.  (Incorporated by reference to the
      Registrant's Report on Form 8-K dated December 18, 2007 and filed on
      December 19, 2007)
4.3
Knight
      Transportation, Inc. Amended and Restated 2003 Stock Option
      Plan.  (Incorporated by reference to the Registrant's Definitive
      Proxy Statement on Schedule 14A filed December 1, 2005)
4.4*
First
      Amendment to the Knight Transportation, Inc. Amended and Restated 2003
      Stock Option Plan
4.5
Second
      Amendment to the Knight Transportation, Inc. Amended and Restated 2003
      Stock Option Plan (Incorporated by reference to
      the  Registrant's Definitive Proxy Statement on Schedule 14A
      filed on April 11, 2008.)
5.1*
Opinion
      of Ryley Carlock & Applewhite, a professional
    association
23.1*
Consent
      of Ryley Carlock & Applewhite, a professional association (see Exhibit
      5.1)
23.2*
Consent
      of Deloitte & Touche LLP, independent public
    accountants
* Filed
herewith.
1/
The page numbers where exhibits (other than those incorporated by reference) may
be found are indicated only on the manually signed Registration
Statement.
-5-