Yes.
Yes, maximum vehicle width permitted is 14', overhead clearance is 13'-6". Here is the toll schedule:
80,000 pounds is the limit.
Generally for travel trailers, the answer is Yes. See http://www.cbbt.com/gas.html Chesapeake Bay Bridge Tunnel regulations state: COMPRESSED GAS REGULATIONSFor Non-Commercial Vehicles Maximum capacity: (a) Not more than two non-permanently mounted containers having maximum individual capacity of 105 pounds water capacity or 45 pounds LP-Gas each, or one container having maximum capacity of 60 pounds LP-Gas, or (b) not more than two permanently mounted containers having maximum total capacity of 200 gallons water capacity LP-Gas when used as a motor fuel. Tanks must meet the approved standards of the Department of Transportation and are subject to inspection at toll plaza. They must be properly secured and valves closed while crossing the facility.
Yes
Yes, but you'd better not be so much as half an inch over the 13'6 height. If you can't clear the bars which hang down over the toll lanes, they won't let you through. If you have an air ride trailer, you can empty the air bags in your trailer and do the same with your tractor air bags, and that should get you through. Otherwise, you'll have to turn around and go the long way.
Most van trailers are 13'6 high. Some western states will allow 14' high trailers.
check tripple A
London Bridge doesn't have a 'top'. If you are referring to the walkway at the top of Tower Bridge, it was intended to allow pedestrians to cross the bridge even when it had been opened to allow river traffic to pass underneath it.
Tower Bridge is the only bridge in London that is capable of opening to allow ships to pass under it.
There are two bridges over the Firth of Forth. The rail bridge and the road bridge.
Because Tower Bridge is the only bridge to open to allow tallish boats to pass through it.