My question involves an easement in the state of: Michigan

A public (township) road crosses a creek via a bridge. The surrounding land is in one private ownership. Parking is not permitted by township ordinance. It appears to be illegal to use the road right of way as public access site to the creek because that is not a use incidental to 'highway transportation'. If there is a police complaint by owner/agent/tennant is the infraction trespassing? Would fishing from the bridge deck also be trespassing?

Does anyone know of a web page that discusses these issues more broadly? I've searched and come up empty so far.

Thanks in advance for any assistance.