page_title: Dumbarton Rail Corridor
section_title: Menlo Park/East Palo Alto to Redwood City (Segment A)
hierarchical_section_title: Dumbarton Rail Corridor / Route description / Menlo Park/East Palo Alto to Redwood City (Segment A)
caption_attribution_description: English: View from a northbound lane of U.S. Route 101 in Menlo Park of the bridge that used to carry rail traffic from and to the Dumbarton Rail Bridge.
context_page_description: The Dumbarton Rail Corridor is a proposed transbay passenger rail line which would reuse the right-of-way that was initially constructed from 1907–1910 as the Dumbarton Cut-off. The Dumbarton Cut-off includes the first structure to span San Francisco Bay, the 1910 Dumbarton Rail Bridge, although the vintage Cut-off bridges would likely be replaced prior to activating new passenger service. Dumbarton Rail Corridor would provide service between Union City in the East Bay and Menlo Park on the Peninsula, with train service continuing to both San Francisco and San José along the existing Caltrain tracks. It has been in the planning stages since 1988, and would be the first above-ground transbay rail line since Key System electric trains stopped running on the lower deck of the Bay Bridge in 1958, and the first new transbay crossing of any kind since the completion of the Transbay Tube in 1974.
context_section_description: The existing two-track Dumbarton Cut-off line would be converted to a single track system with centralized traffic control; the second track would be retained as a siding in certain portions. This segment would include the proposed Willow Road and Redwood City (Second Avenue) stations. The Dumbarton Rail Corridor merges with the Peninsula Corridor in Redwood City at the Redwood Junction, which is a large wye roughly bounded by Middlefield Road, Woodside Road, El Camino Real, and Dumbarton Avenue.
caption: Dumbarton Rail Cut-off bridge over US 101 in Menlo Park. Note the bridge is built for a single track, but the concrete piers are sized to accommodate double-track service.
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