Originally Posted by DieselDrax
The thread subject specifically asks about the Chesapeake Tunnel.
Their official website is a good resource for info - CBBT Recreational Vehicles
It's pretty clear that one should have no problem if driving a Non-Commercial vehicle and has total LPG capacity less than limit.
In my travels whenever there are special regulations for tunnels like this there is usually a place where one can pull off after warning notice and turn off tanks if required.
Only time I had any real difficulty was post 9/11 and I was traveling West across Hoover Dam towing my old 27' Terry TT. Had to pull over and have everything "sniffed" by bomb dogs and had "papers" checked by military personnel with M-16's slung across their chests.
They didn't say a word about my propane tanks