Please consider making the Bay Area Rapid Transit route for Train Sim World 4, which would include the Red Line from Richmond to SFO/Millbrae, the Orange Line from Richmond to Berryessa/North San Jose, the Yellow Line from SFO to Antioch, the Green Line from Daly City to Berryessa, and the Blue Line from Daly City to Dublin/Pleasanton. If you can only make one line, I hope it can be the Yellow Line. If you can make all five lines, please include the cable-driven BART extension from Coliseum to OAK Airport as a rideable service in Free Roam Mode, and the Stadler GTW DMU extension going from the transfer platform just after Pittsburgh Bay Point to Antioch as a drive-able service in Timetable Mode to and from Antioch. Also, please make sure to correctly model the main-line BART tracks as broad gauge (5 foot 6 inch), but model the Stadler GTW tracks as standard gauge (4 foot 8.5 inch). For mainline service, please include the Fleet of the Future (D/E Cars). One last thing - if you can, between Embarcadero and Civic Center/UN Plaza, please model the Muni platforms, and if possible, make the Muni trains ride-able in Free Roam Mode (although I'll be fine if they're just modeled but not rideable.)
As Blacknred noted, it's an automated system, so I don't see a ton of play value here. What I would like, however, would be for a remastered Caltrain route with AI BART trains added around Milbrae. This would add a little more kinetic scenery to the route and make the northern portion a bit more lived-in.
I'm going to add adding VTA light rail trains in Mountain View, the tracks are there. Maybe I can see myself in the game, lol.
