Economical stacked platform solution chosen for BART

23 April 2020

Bay Area Rapid Transit (BART) and the Santa Clara Valley Transportation Authority (VTA) have agreed on a stacked solution to bring rail services to 1.7m Silicon Valley residents. VTA’s 10km BART Silicon Valley Phase 2 extension project comprises four new stations (three underground, one at grade), an 8km TBM-bored tunnel, as well as storage and maintenance facilities. Agreement has centred around stacked tunnels in stations, as opposed to a less economical twin-tunnel approach.

Construction on Phase 2 is expected to begin in 2022, with testing starting in 2028 and completion in 2030. Phase 2 is expected to carry 52,000 passengers by 2035 and to have transformational effects on Silicon Valley. Mott MacDonald/PGH Wong is the general engineering consultant. The 16km Phase 1 section of the line broke ground in April 2012 and, now in its final testing stage, is expected to open for passenger service in 2020.

VTA designed and is constructing the entire 26km BART extension line which will connect Santa Clara County with the existing 175km BART system through to Oakland and San Francisco.