A long-quiet rail line running behind some of Atherton’s priciest backyards is suddenly the hottest political topic in town. A proposal to turn the dormant Dumbarton rail corridor into a bus-only route has town leaders warning that even a single bus stop could effectively rewrite Atherton’s zoning rulebook, clearing the way for multi-story apartment buildings within walking distance of any new stop. The standoff now pits regional transit planners against one of the Peninsula’s most famously protective communities.
SamTrans Study Focuses On A Busway
SamTrans is in the middle of a “Reimagine Dumbarton” study that looks at converting the freight right-of-way between East Palo Alto and Redwood City into a zero-emission bus corridor, paired with new bike and pedestrian paths. According to SamTrans, the effort is framed as community-driven and is centered on near-term improvements for buses, bikes and walking while the agency continues to refine its list of alternatives.
How State Law Changes The Housing Calculus
Hovering over the whole debate is State Senate Bill 79, signed last year, which sets up a statewide framework to allow denser housing near qualifying transit stops and can override some local zoning rules in certain counties. As outlined by KQED, the law takes effect July 1 in counties that include San Mateo and gives special status to development projects located close to rapid transit and high-frequency bus service.
Atherton Leaders Push Back
At a recent public hearing, Atherton residents and council members warned that placing any Dumbarton bus stop inside town limits could trigger SB 79 and loosen what can be built along the rail corridor. “I think there’ll be a very strong amount of opposition,” Councilman Rick DeGolia told the Palo Alto Daily Post, while Councilwoman Elizabeth Lewis called the prospect “very serious.” The Daily Post also reported that the City/County Association of Governments has sent a letter to state Sen. Josh Becker and Assemblyman Marc Berman asking that the Dumbarton project not trigger SB 79 within Atherton.
Timing And Outreach
SamTrans says the Reimagine Dumbarton process includes multiple rounds of public outreach and alternatives analysis, with a focus on identifying near-term options that can be delivered more quickly than a full rail revival. According to SamTrans, the agency plans to rely on community feedback while it narrows the alternatives and expects to have a clearer idea of possible stop locations sometime this summer.
Why The Corridor Is So Controversial
The Dumbarton corridor has been a political tug-of-war for years. Earlier studies looked at restoring rail service, but funding complications, engineering challenges and political resistance have nudged planners toward a busway alternative instead. Streetsblog has documented the agency’s recent turn away from rail and toward a bus-focused plan, and reporting in The Almanac traces SamTrans’ long-running study of the corridor along with past recommendations for a bus line between Redwood City and East Palo Alto.
What Could Come Next
For now, Atherton officials are lobbying regional agencies and state lawmakers for protections if a Dumbarton stop ends up inside town boundaries, even as SB 79 nudges California toward putting more homes near transit. As KQED notes, the law was written to push growth along transit corridors, a statewide goal that is now on a collision course with local resistance up and down the Peninsula.
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