I think I would like an actual piece to represent a rail head (as Larry refers to it). I like Razor/Eagle take on RR to be more like an AB/NB. RR should give extra movement to ground units that’s a given. All original IC’s should come w/RR. To take it one step further, each victory city should get one too. After that buy them at 15 ipc’s like the other facilities.
Some issues to over come:
A) Its easy to give inf/art +1 if they start at a RR. Should you be able to use RR to give tanks/mech +1 (3 moves). With the bigger map size it has work well with AB & NB giving extra movement. With that said all ships start w/2 movement, where ground has 1-2. In Europe there will be a lot more land tt, so a boost to all ground units might be warranted even for tanks. It could also speed up games, but would it give an advantage to one side or the other?
B) Should you be able to use RR in both combat and non combat. Keep in mind you can use AB & NB in both.
C) SBR works just as if you were hitting an AB/NB.
Option: I might go one step further w/SBR allowing you to bomb any tt adjacent to a RR to take away extra movement through that tt (would not change normal movement just +1 in that direction). A stat bmr does a fly by (rolls a dice) place damage chips equal to 1/2 the dice roll rounded down (3 max). If you want to use the RR through that damaged tt pay in your purchase units phase (could be worth getting imp fac tech-1/2 for repairs). You could also place AA guns along the routes you want to take to deter bombings.