I have a question/suggestion regarding the second letter in the label
Is there a special reason why vehicles can only use "A" and roads can use any character?
If not,
I feel that this property is underused and I would like to suggest to change it to:
So position of the vehicle on the surface
With:
A
Normal Position (so if you select drive-left in the game-settings, those vehicles drive on the left and if you select drive-right in the game-settings, those vehicles drive on the right).
Nothing special here
B
Flipped Position (so if you select drive-left in the game-settings, those vehicles drive on the right and if you select drive-right in the game-settings, those vehicles drive on the left).
This may sound weird at the moment, but I have some eyecandy tramtracks in mind, where this feature would be very usefull for.
C
Centered/middle Position
These vehicles will drive in the exact middle of a surface (like for example GarryG's marching soldiers).
I think this way it may be possible to keep those kinds of "special" vehicles constricted to only certain roads/tramtracks and not wonder off everywhere
Could this be considered?