The San Francisco Peninsula Commuter Corridor consists of double track CTC main line which runs between San Francisco (Mp 0.0) and San Jose (Mp 47.5) (which technically is on UP's Coast Subdivision). The action on the line is hot and heavy especially during commute times. The JPB runs upwards of 96 commuter trains on Weekdays, with as little as 10 minutes separation between trains at peak commute hour.