Bah!
Gotta tell you, if the ballasting issue could be figured out it would be a spiffy alternative to the Bloody Long Island Rail Road as a means to move people from their homes forty miles or so to NYC.
Advantages of dirigible over BLIRR:
Goes faster (even if not moving).
No mad rocking from side to side a-la Seaview in a sub vs monster scenario. Who bought these new trains anyway?
Not subject to stupid avoidable delays due to "the wrong sorts of leaves on tracks" or the thirty five plus year old "tunnels only signaled in one direction (and it's the wrong direction)" idiocies.
Don't have to listen to "famous" people who never ride the BLIRR telling me how to ride the BLIRR ("Don't fall on the tracks")
Don't have to listen to moronic list of stations that the next train would have stopped at if in fact the train in question had not been cancelled being read over the P.A. (instead of useful information like when the next train might actually put in an appearance).
Don't have to deal with sub-human levels of intelligence of BLIRR management bring to the table at every "challenge".
Finally: Would actually be able to use an alternative form of transport as suggested by spokesdrones every f***ing time the BLIRR breaks down marooning me in NYC - and as a bonus, never have to go back to the trains afterwards.