Caltrain has been studying passing tracks as an option in its capacity analysis. Without passing tracks, the corridor can carry 6 Caltrains and 2 High Speed Rail trains per direction per hour at peak. With passing track, the corridor can carry up to 4 high speed trains.

The MOU mentions “potential passing tracks” as part of the Blended System. But there is no funding identified or allocated for the passing tracks, and the first stage of Caltrain’s plan does not include them. Additional environmental review would be needed for passing tracks.