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San Jose DOT selects at‑grade alternative for Diridon Station; environmental review to follow
Summary
City DOT staff told the Downtown Parking Board the project team selected a shorter, less costly at‑grade alternative for Diridon Station and will move that design into environmental review; study work will evaluate grade separations and neighborhood access changes.
Eric Eidland, station planning manager with City DOT, told the Downtown Parking Board that staff has selected a preferred, at‑grade alternative for the Diridon Station project and will move that concept into environmental review.
The preferred concept keeps the historic depot in place while regrading adjacent areas to create a new concourse and passenger level below parts of the existing grade. “It’s obviously a very big and long‑term project, so it’s not gonna be cheap or inexpensive, but we’re trying to get the best value possible,” Eidland said during the meeting.
Why it matters: the Diridon Station area is the focal point for multiple regional projects. The alternative staff recommended is intended to shorten construction duration and lower property‑impact and implementation complexity compared with an elevated‑track option, Eidland said. Staff described the preferred concept as requiring fewer property takings and avoiding extensive reconstruction of nearby Caltrain maintenance facilities.
Key details: City DOT said the selected alternative would reduce construction time compared with the elevated option (staff estimated a shorter construction window, roughly 7–10 years versus a longer 10–12‑year duration for more invasive alternatives). The team emphasized the tradeoffs: the at‑grade alternative is less costly to build and stage but still requires substantial work on local crossings and street regrades.
Planned follow‑up and study items include: focused studies on two nearby rail crossings (staff proposed closing one crossing to vehicles and providing a bike/pedestrian undercrossing and providing a full underpass at another crossing); a district‑level access study to test multiple intersection and ramp options; construction‑phasing and delivery analyses; and hiring a dedicated program director to coordinate the multi‑agency effort.
What staff said about impacts: Eidland noted the plan includes expanded concourses, retail frontages, plazas on both station sides, reconfiguration of tracks to accommodate more trains, and noise mitigation along the corridor. Staff also flagged significant site‑specific impacts at the two crossings and said they have procured or are finalizing consultants for technical work, environmental review, and community engagement.
Next steps: the project will enter environmental review with a contracted consultant, and staff said community outreach will focus on grade‑crossing changes and neighborhood interfaces. Eidland said the project team is evaluating a dedicated delivery model, such as a construction authority or transit district, to oversee the multi‑agency program over the long term.
Board context: the presentation to the Downtown Parking Board was informational; no board vote was taken on the station design at the meeting.
