Only bicycles are allowed on a cycleway. This is NOT a cycleway. 

"The Flint River Trail system is a network of approximately 27 miles of nonmotorized multipurpose paved trails" (1)

Based on their posted rules, it might be more accurate to call it a footway that allows bicycles.
"Bicyclists yield to all users." (2)

We call these multi-use paths (3) in Michigan. These are common, whereas cycleways are very-very rare.

See also "Signposted foot and bicycle path" (4).

(1) https://www.flintriver.org/bike-walk
(2) https://gcmpc.org/wp-content/uploads/2015/11/M21378_FlintRivWtrshd-TrailMap.pdf
(3) https://wiki.openstreetmap.org/wiki/Michigan#Paths_/_Trails
(4) https://wiki.openstreetmap.org/wiki/Tag:highway%3Dpath