This is based on the high level bridge at Edmonton, Alberta Canada on the Canadian
Pacfic railroad. Originally this had three tracks with the center track carrying the Canadian Pacific
and the outer two carrying the Edmonton streetcar line. Today only the center track remains. The outer
two can be removed by changing the track kuid for tracks 2 and 3 to one for invisible track in the
config file. They can be put back later if desired since the attachment points are still in the mesh.
The road was originally one way but I used invisible road which will change to whatever is attached to it.