VTA said it will no longer pursue its original single-bore tunnel design due to high risk and cost.Photo – BART Facebook
The Santa Clara Valley Transportation Authority's (VTA) board earlier this month announced it will evaluate a new rail tunnel design for the Bay Area Rapid Transit (BART) Silicon Valley Phase II Project that will extend rail 6 miles into downtown San Jose and Santa Clara, California.
VTA will no longer pursue its original single-bore tunnel design with side-by-side tracks because the engineering team — which reached a 10 percent design level — indicated higher projected risks and costs beyond the funding available, agency officials said in a press release.