Are we considered "trucks" on the road?

I do believe the OP needed to know how the law looked at RV's and if truck speed limits applied when not towing. Doesn't matter if you are a bowling ball or ping pong ball you are a sphere. Seneca or Sentra even engineers and scientists will tell you that there is no substitute for mass in a collision. Small light and agile to avoid but I want to be in a cement mixer when I hit something.