prohibited tunnels "propane"

2chiefsRus is correct about the Baltimore tunnels. If you go through towing or in a RV they will stop you on the assumption that you have propane onboard. Turned off doesn't matter. It is a large fine and to make matters worse it is a "must appear" ticket. No paying by mail.

There are two tunnels under Mobile Bay
in Alabama (I 10 and U S 90). NEITHER has ANY propane
restrictions for R V's.

Propane will always be prohibited in low-lying tunnels & strictly prohibited in under ground garages. It is restricted because propane does not dissipate it tends to collect & pool in the low spots. When it comes to explosive gas they err on the side of caution & any is too much

This is the only one I have first hand experience with -

The Transport of Hazardous Materials Across our Toll Facilities

Code of Maryland Regulations (COMAR) govern the transport of hazardous materials across our toll facilities. Under these regulations, vehicles carrying bottled propane gas in excess of 10 pounds per container (maximum of 10 containers), bulk gasoline, explosives, significant amounts of radioactive materials, and other hazardous materials are prohibited from using the Fort McHenry Tunnel (I-95) or the Baltimore Harbor Tunnel (I-895). The Francis Scott Key Bridge (I-695, the Baltimore Beltway) is a convenient alternative route for crossing Baltimore's Harbor.


Visit the Division of State Documents' website at www.dsd.state.md.us/comar/ to view the actual COMAR regulations: Title 11, Subtitle 7, Chapter 1 (11.07.01).

I had heard that the the tanks had to be shut-off. And the inspector had to make sure it was, before you could transit through the tunnel. Not a big problem, but a bit of a hassle, depending on how slow they are to get you cleared.

We haven't been everywhere (yet), but have been all over the U.S. and back many times...

only propane restrictions we have come across were a very few tunnels and on ferry boats...the requirement was only that the tanks were shut off.