I'm thinking that with all this talk of Quonset huts and the great Lionel example that an awesome diorama for the RR/this thread would be to use one on a used car lot. The Quonset hut would be the office. Lots of cars, lots of vari-colored triangular flags flapping overhead, and a rail line in the back of the lot.
Just dreaming out loud ...
P.S. -- Go Seabees!