I'd love to see this getting finished, All we need now is a map made for trains only! (cars too obviously)
Take a look @ Tennessee USA, it has over a dozen miles of train track. It's got a dodgey spot or two in the track I tried multiple times to work out but otherwise you can cruise down the line with it.
Buddy, that's really not how this works. Making a beamng.drive vehicle is an incredibly complex process that takes a very long time to finish. It's hours and hours of work, no modder is going to make an entire vehicle just because you asked them to.