In Virginia, the Chesapeake Bay Bridge, Hampton Roads tunnel. and the Monitor & Merrimack tunnel, RV must stop for inspection prior to entering the tunnel, they ask that the propane is turned off. They could inspect but usually take the drivers word. They are very courteous and just doing their job, there are pull offs on the other side of the tunnels if you wanted to turn it back on, I just usually wait till my destination.
Chuck " still in Va "
2012 3065w Windjammer
2012 f250 lariat Crew cab power stroke (of course )