Usually, no, although some states require that ALL vehicles over a certain weight do. Unfortunately, some of those states also exempt motorhomes, because the FMCSA - which seems to serve only to make life more difficult for commercial drivers at every turn - does not regulate recreational vehicles, whatsoever. So, no matter how untrained, unqualified, or unsafe a motor home driver is, they aren't required to stop.
No, they do not. RVs are largely unregulated (I'd be inclined to say dangerously so) compared to Commercial Motor Vehicles, and are not subject to the same regulations and restrictions, even if they have a Gross Vehicle Weight Rating which would require a commercial vehicle of the same weight rating to enter the scalehouses.
No, weigh stations are for commercial cargo vehicles.
If requested to do so
Interstate weigh stations require any large truck to stop at the stations when they are open and active. A dump truck qualifies as a large truck that would need to stop.
85000
Some states may require it. Ports of Entry in New Mexico require rental vehicles to stop.
To weigh in to make sure that they are not overloaded (because they causes more stress on the roads sometimes in towns at stop lights and stuff you can see the grooves in the tarmack were the trucks come through alot)
Some states do require it. Some states require all rental vehicles to stop at ports of entry (New Mexico is one).
If they would be considered a CMV without the farm plates, yes.
In most states, no. However, some states may require commercial vehicles with a GVWR of as little as 8000 lbs. to stop at weigh stations.
it depends what vehicle a truck can weigh more than a car. and a motorhome weighs more than a ford contour
6200 lbs
2000 lbs.