In the USA walking/cycling paths/greenways you can ride on them just not under engine power. Cyclist must yield to pedestrians and alert them using a bell/low volume horn when approaching them from behind.
Different munis have different rules.
In Tampa, you'd be shocked how many people you see on mopeds on sidewalks.
Just because you don't see it, doesn't mean it isn't happening.
My understanding of the regs in my state is that a motorized bicycle can be operated anywhere a standard non-motorized bicycle can - sidewalks, trails and off-road while on motor power. Including I-40, which is legal for bicycles here
what state do you live in ?
There's no state in the USA which allows a combustion engine vehicle to be operated on a sidewalk. If you can't post the legal statutes then you don't know what your laws are. No motorized bicycle or bicycle is allowed onto an interstate roadway in the USA.
Only one exception that I know of...That would be those sidewalk ICE powered mini snowplows that you see in many of the major Northeast cities during major snow emergencies...lol.
Arizona. My understanding is that in AZ, motorized bicycles are considered to be bicycles in every respect, including limitations on where they can be ridden and all other required behaviors for riding a bicycle. We have limits on such things as engine size and a speed limit, but are permitted wherever a bicycle is. If there's a limitation re sidewalks.... I missed it (entirely possible!) .
