In searching around on the web, I found a new tram route for MSTS. It is modeled after Romanian systems.
It is the Constanta Tramway. The home page URL is http://www.ruta-constanta.trenulezze.ro./
It includes several lines and a very nice variety of types of operation. There is at least one grand union!
On the homepage, the drop-down links at the top of the graphic get you to the Downloads.
'Ruta constanta" will take you to the link to download the Route, "material rulant" will take you to four types of equipment
which are apparently appropriate to the Route. It took 18 minutes to download with a Charter "high-speed" link.
It requires Scale Roads Public Beta 1.77. It installed easily and started right up.
I have created three activities using the AE without too much hassle.