VASONA SIGNAL CIRCUIT REPLACEMENT

The contract seeks proposals from qualified firms to conduct a thorough evaluation of the existing Vasona Corridor signal system used in VTA’s light rail operations and to deliver complete engineering design services for upgrading this system. The current setup employs AFTAC II train detection alongside Electrocode DC fixed block systems, all managed by the VHLC microprocessor. This system also controls the US&S gate mechanisms at highway-rail grade crossings shared with Union Pacific freight trains. The firm must consider upcoming independent signal modifications on other parts of the VTA system and incorporate assumptions regarding future light rail car specifications, including new onboard technologies for positive train control, differing car lengths, and braking distances. Ongoing upgrades elsewhere, such as the transition from HXP-3R to Alstom XP4 train predictors on the Vasona corridor and an overhaul of the VHLC system on the Guadalupe Southline, are relevant to this project’s context. The awarded firm will be responsible for producing comprehensive Plans, Specifications, and Estimates (PS&E) and providing support throughout the bidding and construction phases of the project. The solicitation, titled "VASONA SIGNAL CIRCUIT REPLACEMENT," is managed by the Engineering and Program Delivery office in California, with a submission deadline of June 23, 2026. Key points of contact include the Project Manager, Emily Chou, and Contracts Administrator, Chris Valle. The scope emphasizes integration with current and planned system upgrades, ensuring compatibility with evolving technology and operational requirements within the VTA network.