Road width

I,m a surveyor technician the right of way widths differ for federal, state, county, city or township.
I've seen it from 16.5' , 33',up to 100' or more each side of center line of the road depending on the type of road , utilities or drainage.
Most county roads are on section and quarter section lines but not always.

I would check with or county surveyor or other local government engineering department.

If you do any clearing get permission first. You don't want anyone p.o'ed at you!