David,
a couple of years ago, we toured the new england states in our 31 foot motor home. Our jumping off place was Burlington NJ. I called the state hiway department before getting on the NJ turnpike, as they have truck only lanes. I was told at that time that I could use the same lanes as autos.
We drove all the way to Bangor Maine using I-95 and the alternate interstae by passes around Boston. We crossed the George Washington bridge and drove straight though NYC on I-95. I would not recommend doing it as the road though the Bronx was worst than than the Alaska hiway. We have traveled both. The road had extremely deep pot holes and broken pavement. We jarred loose more things inside the vehicle and possibly outside that I care to mention
No where did we encouter any probition of propane or have to shut off our supply valve in our MH. The only restriction we encountered was when we tried to drive to the top of mount washington. They did not approve of our Saturn automatic transmission.
I also checked with all of the state hiway officals of the states we passed through and was told that as long as I stayed on the major roads that I would not encounter any low over passes, (semi trucks use these hiways). Our trip traversed the upper portions of the new england staes, route 2 as I recall and the just before lake Champlain, we took a diagonal route back to Coatsville, Penn.
Hope this helps,good luck in you travels, Jerry
Years ago we had a very small RV and wanted to drive to NYC. It took many extra miles and many hours until we found a bridge we could use that allowed LP.
