This is a simple train station with a simple multi-track selector. If you want another track, just add another module. The main component that makes this all work is a T flip-flop, or a modified version. Not sure exactly, I'm not an electrical guru, lol.

As of now I'm not posting a world save as I think that the pictures are enough to convey how this functions. However, If you guys still have a hard time understanding it I could post a world save. It's not an exciting map at all though =P

FEEDBACK WOULD BE NICE
Just sayin...