SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549



                                    FORM 8-K



                                 CURRENT REPORT
                         Pursuant to Section 13 or 15(d)
                     of the Securities Exchange Act of 1934



                        Date of Report: March 23, 2001





                          SWIFT TRANSPORTATION CO, INC.
             (Exact Name of Registrant as Specified in its Charter)





           Nevada                        0-18605                 86-0666860
  (State or other jurisdiction    (Commission File Number)     (I.R.S Employer
of incorporation or organization)                           (Identification No.)




                             2200 South 75th Avenue
                             Phoenix, Arizona 85043
               (Address of Principal Executive Offices) (Zip Code)



                                 (602) 269-9700
              (Registrant's Telephone Number, Including Area Code)



<PAGE>

ITEM  7.  EXHIBITS.
         (c)  Exhibits
                  (99) Slide Presentation of Swift Transportation Co., Inc.

ITEM  9.  REGULATION FD DISCLOSURE.

         Swift has prepared a slide  presentation  that it intends to utilize in
meetings  with  investors,  stockholders,  and  analysts.  A copy  of the  slide
presentation is filed herewith as Exhibit 99.

         Certain   information  in  this  filing  consists  of   forward-looking
statements within the meaning of the Private Securities Litigation Reform Act of
1995. Such statements  include,  but are not limited to,  statements  concerning
Swift's future growth,  Swift's projected revenues,  Swift's ability to recruit,
train and retain qualified drivers,  Swift's low operational costs, the benefits
of  Swift's  terminal  network,  industry  challenges  generally,  the  industry
challenges  that affect  Swift,  the pending  merger with M.S.  Carriers,  Inc.,
projected revenue and cost benefits of the merger,  and the pro forma ranking of
the merged companies in various industry  categories.  Such statements are based
upon the current beliefs and expectations of Swift's  management and are subject
to significant risks and uncertainties. Actual results may differ from those set
forth in the  forward-looking  statements.  As to Swift's business and financial
performance  generally,  the following factors, among others, could cause actual
results to differ materially from those in  forward-looking  statements:  excess
capacity in the trucking industry;  significant  increases or rapid fluctuations
in fuel prices,  interest rates,  fuel taxes,  tolls,  license and  registration
fees;  difficulty  in  attracting  and  retaining  qualified  drivers  and owner
operators,  especially in light of the current shortage of qualified drivers and
owner  operators;  recessionary  economic  cycles and  downturns  in  customers'
business cycles,  particularly in market segments and industries (such as retail
and manufacturing) in which Swift has a significant  concentration of customers;
a significant  reduction in or termination of the Company's trucking services by
a key customer;  seasonal factors such as harsh weather conditions that increase
operating  costs;  increases in driver  compensation to the extent not offset by
increases  in  freight  rates;  the  inability  of Swift to  continue  to secure
acceptable financing arrangements;  the ability of Swift to continue to identify
and combine acquisition candidates that will result in successful  combinations,
including Swift's pending merger with M.S. Carriers,  Inc.;  increases in claims
or the cost of insurance;  and  competition  from trucking,  rail and intermodal
competitors.  With respect to the proposed  acquisition of M.S.  Carriers,  Inc.
these  risks and  uncertainties  include:  the  ability  to obtain  governmental
approvals  of the merger on the  proposed  terms and  schedule;  the  failure of
Swift's and M.S. Carriers' stockholders to approve the merger; the risk that the
businesses will not be integrated  successfully or that  integration  costs will
exceed our  estimates;  the risk that the revenue and other  synergies  and cost
savings from the merger may not be fully  realized or may take longer to realize
than expected;  fluctuating stock market levels; the difficulty the stock market
may have in valuing the business model of the combined  company;  and disruption
from  the  merger  making  it more  difficult  to  maintain  relationships  with
customers, employees or suppliers.

         A discussion  of these and other  factors that could cause  Swift's and
M.S.  Carriers  results  to  differ  materially  from  those  described  in  the
forward-looking  statements  can be found in the most recent  Annual  Reports on
Forms 10-K of Swift and M.S.  Carriers,  filed with the  Securities and Exchange
Commission and available at the Securities  and Exchange  Commission's  internet
site (http://www.sec.gov).  Swift undertakes no obligation to publicly update or
revise any forward-looking  statements,  whether as a result of new information,
future events, or otherwise.  Further,  nothing herein shall constitute adoption
or approval of any analyst report regarding Swift, nor any undertaking to update
or comment upon analysts' expectations in the future.

                                       2

<PAGE>

SIGNATURE

         Pursuant to the  requirements  of the Securities  Exchange Act of 1934,
the  registrant  has duly  caused  this report to be signed on its behalf by the
undersigned thereunto duly authorized.


SWIFT TRANSPORTATION CO., INC
March 23, 2001


/s/ William F. Riley III
----------------------------
William F. Riley III
Senior Executive Vice President,
Chief Financial Officer and Secretary

                                       3
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SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                    FORM 8-K

                                 CURRENT REPORT
                         Pursuant to Section 13 or 15(d)
                     of the Securities Exchange Act of 1934

                        Date of Report: March 23, 2001

                          SWIFT TRANSPORTATION CO, INC.
             (Exact Name of Registrant as Specified in its Charter)

           Nevada                        0-18605                 86-0666860
  (State or other jurisdiction    (Commission File Number)     (I.R.S Employer
of incorporation or organization)                           (Identification No.)

                             2200 South 75th Avenue
                             Phoenix, Arizona 85043
               (Address of Principal Executive Offices) (Zip Code)

                                 (602) 269-9700
              (Registrant's Telephone Number, Including Area Code)
ITEM  7.  EXHIBITS.
         (c)  Exhibits
                  (99) Slide Presentation of Swift Transportation Co., Inc.

ITEM  9.  REGULATION FD DISCLOSURE.

         Swift has prepared a slide  presentation  that it intends to utilize in
meetings  with  investors,  stockholders,  and  analysts.  A copy  of the  slide
presentation is filed herewith as Exhibit 99.

         Certain   information  in  this  filing  consists  of   forward-looking
statements within the meaning of the Private Securities Litigation Reform Act of
1995. Such statements  include,  but are not limited to,  statements  concerning
Swift's future growth,  Swift's projected revenues,  Swift's ability to recruit,
train and retain qualified drivers,  Swift's low operational costs, the benefits
of  Swift's  terminal  network,  industry  challenges  generally,  the  industry
challenges  that affect  Swift,  the pending  merger with M.S.  Carriers,  Inc.,
projected revenue and cost benefits of the merger,  and the pro forma ranking of
the merged companies in various industry  categories.  Such statements are based
upon the current beliefs and expectations of Swift's  management and are subject
to significant risks and uncertainties. Actual results may differ from those set
forth in the  forward-looking  statements.  As to Swift's business and financial
performance  generally,  the following factors, among others, could cause actual
results to differ materially from those in  forward-looking  statements:  excess
capacity in the trucking industry;  significant  increases or rapid fluctuations
in fuel prices,  interest rates,  fuel taxes,  tolls,  license and  registration
fees;  difficulty  in  attracting  and  retaining  qualified  drivers  and owner
operators,  especially in light of the current shortage of qualified drivers and
owner  operators;  recessionary  economic  cycles and  downturns  in  customers'
business cycles,  particularly in market segments and industries (such as retail
and manufacturing) in which Swift has a significant  concentration of customers;
a significant  reduction in or termination of the Company's trucking services by
a key customer;  seasonal factors such as harsh weather conditions that increase
operating  costs;  increases in driver  compensation to the extent not offset by
increases  in  freight  rates;  the  inability  of Swift to  continue  to secure
acceptable financing arrangements;  the ability of Swift to continue to identify
and combine acquisition candidates that will result in successful  combinations,
including Swift's pending merger with M.S. Carriers,  Inc.;  increases in claims
or the cost of insurance;  and  competition  from trucking,  rail and intermodal
competitors.  With respect to the proposed  acquisition of M.S.  Carriers,  Inc.
these  risks and  uncertainties  include:  the  ability  to obtain  governmental
approvals  of the merger on the  proposed  terms and  schedule;  the  failure of
Swift's and M.S. Carriers' stockholders to approve the merger; the risk that the
businesses will not be integrated  successfully or that  integration  costs will
exceed our  estimates;  the risk that the revenue and other  synergies  and cost
savings from the merger may not be fully  realized or may take longer to realize
than expected;  fluctuating stock market levels; the difficulty the stock market
may have in valuing the business model of the combined  company;  and disruption
from  the  merger  making  it more  difficult  to  maintain  relationships  with
customers, employees or suppliers.

         A discussion  of these and other  factors that could cause  Swift's and
M.S.  Carriers  results  to  differ  materially  from  those  described  in  the
forward-looking  statements  can be found in the most recent  Annual  Reports on
Forms 10-K of Swift and M.S.  Carriers,  filed with the  Securities and Exchange
Commission and available at the Securities  and Exchange  Commission's  internet
site (http://www.sec.gov).  Swift undertakes no obligation to publicly update or
revise any forward-looking  statements,  whether as a result of new information,
future events, or otherwise.  Further,  nothing herein shall constitute adoption
or approval of any analyst report regarding Swift, nor any undertaking to update
or comment upon analysts' expectations in the future.

                                       2
SIGNATURE

         Pursuant to the  requirements  of the Securities  Exchange Act of 1934,
the  registrant  has duly  caused  this report to be signed on its behalf by the
undersigned thereunto duly authorized.

SWIFT TRANSPORTATION CO., INC
March 23, 2001

/s/ William F. Riley III
----------------------------
William F. Riley III
Senior Executive Vice President,
Chief Financial Officer and Secretary

                                       3