Identity crisis

[gus]

As Brian says, I've never seen a state with RV speed limits that did not specifically list them.

RVs are not trucks no matter what the configuration. There are plenty of truck tractors pulling large travel trailers and large trucks converted to RVs, none of these are trucks for speed limit or any other rules.

[belfert]

I will follow truck speed limits if they are for good reason like going through the mountains.  I will usually stay out of lanes that are not for trucks because I don't need the headache of explaining to an officer I am legally not a truck.  If there is a truck lane in a construction zone I will always take that lane as I am just as wide and tall as a semi.

The speed limits on the Ohio Turnpike read like a billboard.  The signs are enormous and there are at least four different limits listed.  (This may have changed since 2006.)

[gus]

I think most highway patrolmen can tell if any vehicle is an RV by looking for ACs on top, that is the easiest way to tell.