Twin Peaks Tunnel Automatic Train Control System (ATCS) W1 Crossover Activation

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Twin Peaks Tunnel Automatic Train Control System (ATCS) W1 Crossover Activation Share this: Facebook Twitter LinkedIn Project Timeline Winter 2018 Planning: Winter 2018 - Spring 2019 Pending Spring 2019 Detailed Design: Spring 2019 - Summer 2019 Pending Summer 2019 Construction: Summer 2019 - Summer 2020 Pending Summer 2020 Closeout: Summer 2020 - Fall 2020 Pending Current Phase or Stage Planning Predicted Completion Fall 2020 Project Status Current Improvements Improve light rail service, safety, and reliability Bus Routes and Rail Lines K Ingleside L Taraval (Suspended) M Ocean View S Shuttle T Third Street Neighborhoods West of Twin Peaks Definitions 1. Automatic Train Control System (ATCS) ATCS controls the automatic movement of Light Rail Vehicles (LRV) through the MUNI Metro Subway. The system enforces a minimum safety separation between trains based on a safe braking distance from the last verified position of the rear of a preceding train. ATCS also permits vehicles to move through the tunnel at a faster pace than allowable when vehicles are operated under human control. This system is critical in supporting the current transit service levels, which are not achievable without this technology. 2. Crossover A crossover is a pair of switches that connects two parallel rail tracks, allowing a train on one track to cross over to the other. 3. Interlock An interlock is an arrangement of signals that prevents conflicting movements through an arrangement of tracks. The Plan As planned, the trackwork for the W1 crossover was installed but not signaled during the Twin Peak Track Replacement. The W1 crossover is the crossover closest to West Portal station in the Twin Peaks tunnel. Signaling the W1 will allow outbound trains to turn around at the West Portal inbound platform and head back into the tunnel. This project will also integrate the interlock at West Portal and Ulloa streets to automatically coordinate train traffic through West Portal station. Signaling the W1 crossover will improve subway system flexibility and efficiency thereby improving light rail service, safety, and reliability. Contact Information Dan Howard Dan.Howard@sfmta.com 415.646.4119