now that IS a good idea!As von Marwitz says
"Lastly, one could just settle on 'one RR car' per counter and per hex, acknowledging some level of abstraction despite a RR car being shorter than 40 meters. This causes no 'technical' problems with regard to the rules problems at all. For that reason, it is probably the most sensible thing to do.
After all, you could park a number of Tigers in a row in a 40m hex as well, which never happens because the overstacking penalties incurred by the system."
This is the rules as presently written. The idea that a 25 foot AFV (or even the small L3 tankette) can cause a LOS hindrance in a 120 foot wide hex is a game abstraction to begin with.
I see no difference here, one RR Car per hex would be an abstraction on the same order (and easier to visualize) and the train would be treated as vehicles in Convoy except that the MP would all be based on the Locomotive.
Another thought for all of you. Since RR Tracks are normally kept fairly level when build, how would using the Level 0 Open Ground Green (map color) for a base counter color. The actual car drawings could be either wood brown or steel grey with the white Open-top conventions that we are already used to? Kinda like the Glider being blue on 1 side (airborne) and Green of the (Earth-bound) side.