VTA Says Single Tunnel Under San Jose for BART Will Be Cheaper, Less Disruptive

BART To San Jose Project Seems to Be Settling on Single-Tunnel, or ‘Single-Bore’ Design

The latest update on the BART-to-San Jose project of course comes with more cost overruns and time delays, but transit officials say a single-tunnel design would involve fewer cost overruns and time delays than a double-tunnel design.It’s hard to get excited over the BART-to-San Jose extension, simply because last we heard, it would not be finished until the year 2034 (and at a cost of $9.1 billion, while BART simultaneously claims to be going o…

VTA says switching tunnel design for BART extension would cost $600 million more — but independent experts call it “overinflated”

A highly anticipated report on the San Jose BART extension revealed that switching the tunnel design could add $600 million to the already $12.75 billion project – an estimate questioned by independent experts who challenged its “validity,” arguing it appeared “to be overinflated.” For years, critics have assailed the Santa Clara Valley Transportation Authority’s 2018 decision to build the six-mile, four-station extension — which will run from t…

VTA says single tunnel under San Jose for BART will be cheaper, less disruptive

South Bay transportation leaders are a step closer to pushing BART service deeper into Santa Clara County. After a yearslong debate over whether to build one tunnel or two, VTA says it has now finalized its plan, settling on building a single tunnel underneath Santa Clara Street to bring BART to downtown San Jose. VTA planners on Monday released a cost report that they will present to their board of directors on Thursday. They say drilling a sin…