"Roger" wrote:
Not all public roads are state, or federal roads. There are also
county roads which fall under county and possibly township, and
municipal laws. So, at least in Michigan you may land on a road
way out in the country with no problem.

Michigan law reads this way:

259.80d Landing aircraft.

(1) An aircraft shall not land, except in an emergency, on private
property, other than upon recognized landing areas, unless express
permission is secured from the owner or lessee.

(2) A person shall not land an aircraft on a public highway, except in
an emergency. A person shall not operate an aircraft on a public
highway unless traffic is controlled by law enforcement officials.

FF