I'd like to make a suggestion for this. Instead of changing the track type, do it as a station or signals or both. If you change the track type, you would have to change ALL of the rail vehicles to use with it and that's a LOT more work that many wouldn't want to do and it would take a long time to do them all as well. And, you would have to make the rail vehicles use 2 track types and I don't think it's possible like the road vehicles do.
I say a station because it can be used to deliver things to if wanting to. I also think signals would be good because I only use 2 signal types in my games and wouldn't think many use many more than that so there should be plenty of slots for it and you can use it as a signal as well which will most likely be needed.
I thought about creating a new road type and just rotate the graphics. You could switch the two straight pieces and the track should cover the road as usual but Lomo places rail crossings on either side of the road and I can't find a place to eliminate them so that's probably not a good way to do it.
@Nathanxbox20; for your raodtrains, I wanted to do the same thing when I was making trucks and the closest I could get to them is 2 trailers. You can look at the trucks I made to give you one idea of doing what you want.
[REL] US Semi Trucks Pack Also, if you need some trucks for your project, let me know and I can send you some. I have a boat load of them taken from the different truck sims. I have them saved as 3ds max files tho but can export them into .3ds files for ya if needed. Send me a pm if you can use some.