Caltrain lists over 1000 people on board in Sunnyvale and that's with only 5-6 cars: https://www.caltrain.com/media/3442/download?inline https://www.caltrain.co

Caltrain lists over 1000 people on board in Sunnyvale and that's with only 5-6 cars: https://www.caltrain.com/media/3442/download?inline https://www.caltrain.com/media/3442/download?inline. Add more cars, improve signaling and boarding and a train every ~2 minutes seems entirely reasonable for the route capacity of heavy rail: https://en.wikipedia.org/wiki/Route_capacity https://en.wikipedia.org/wiki/Route_capacity