That is one possibility John, but of course only I could use the resulting tram in game. Depending on the size of the carbody it might also look a bit odd.
In any event, my initial efforts to get a (standard gauge) tram related route off the ground are proving somewhat frustrating. This is one type of railway where 2D flat splines sitting 0.20m above the terrain after smoothing really do not help. You can drop the spline points but if you do that with the overlaid road section by a similar amount, it is either proud of the rails or under the terrain. Thus far I haven't been able to find any traffic free 3D/chunky mesh road splies which would avoid this problem. I know it can be done as there are several tram routes about including those built in to TS2010, but observation of these is that they seem to lie on flat ground, the problems start when laying track up and down hill.
The quality of some of the trams available varies too -an Aussie tram I tried was a lovely model with good sounds, but no cab or interior view. One of the Japanese cars I tried accelerated from 0 - 30 km/h in about two seconds and a light brake application (being Trainz there is no EP or stepped brake, just set and lap) had the same result stopping. The thing would need Starfleet inertial dampers!
Anyhow I shall continue my quest as of the three big sims, only Trainz has anything approaching a reasonable amount of tram support.
