Caltrain also has limited ability to route around accidents, and in some cases has to run trains the "wrong way" on the other side of the tracks to get past certain areas.

They also have no communication at all. Back when I had a Caltrain commute I would use Twitter to find out if there were accidents or delays, because the station signs were alway wrong and almost all of the stations are unstaffed. I would see posts on Twitter from people who were on a train that crashed into a car and the station signs would still say everything was on schedule.