Author: P. Doig
Underground Construction Conference, July 2003, London, U.K.
Abstract
The Santa Clara Valley Transportation Authority (VTA) is constructing significant extensions to its Light Rail Transit (LRT) system in the metropolitan San Jose area. These include the Vasona line that will extend from downtown San Jose to the suburb of Campbell. At busy Diridon station (see Fig. 1), trains will travel for 480 m in a subterranean section, comprising tightly-curved tunnel and straight approach ramps. The tunnel passes under streets, a bus terminal, rail tracks and platforms, and is very close to the historic station building. The project also includes an extension to the existing pedestrian tunnel that will connect the main line station to the new LRT station.
