It depends on the state and the type of bike.
10
Outside of city limits.
Yes, but outside the Chicago City Limits.
On public property, yes.
Any public road that is not an Interstate highway or that is not access on federal land.
Typically, no. There may be cases where an exception is granted by permit, and these will usually require that vehicle to be escorted by road legal vehicles.
No, it is not legal.
It's not legal for anyone to walk around naked outside in public. It's indecent exposure.
If the moped is street legal and requires a license plate you cannot drive it at 13 years old on any public streets or highway.
It is legal to drive a tractor on the highway as long as you are going directly on the side to where you will take it and do your work.
Yes it is leagal to cross a closes highway
It is not legal to drive these sorts of vehicles on the road without a license. It is allowed if it is on private property with the permission of the owner, but it is illegal to use it on a public highway.