Key System's 500 Class interurbans were all scrapped before the end of operations in 1958. Only photographs and surprisingly good blueprints exist of them, but their long 40+ year careers serving Oakland, California, and the east bay weren't forgotten by locals.
So I set out to recreate them for the first time digitally. Jay was at the helm 3D modeling them in Maya while I advised on details, paint, and other things along the way, providing plans and photos to bring them to life.
The real cars were of wood and steel construction, with varnished wood interiors. For cities skylines, you want to balance detail level with game performance, so these models aren't intended to be "train sim" level hyperdetail, but to be handsome additions to the street and match the rest of the game's level of detail. I'm deeply pleased with them, and they're so satisfying to see trundling along the street.
If you want them in your city, you can download them off of the Presidio Bay Patreon as well. They include realistic traction motor sounds and a gong bell just like the one they had.