Diridon Subway Project, San Jose, CA

Biggs Cardosa was the prime consultant for the structural design for all major structural elements along the five-mile extension of the Santa Clara Valley Transportation Authority’s light rail system, from the City of San Jose into downtown San Jose. One of the structures designed under our contract was the Diridon Subway. The subway extends underneath 12 railroad tracks, the multi-modal transit facility, and State Highway 82, requiring coordination with the JPB/Caltrain, Amtrak, UPRR, Caltrans and City of San Jose. The main subway section is approximately 250 meters (800 feet) long and consists of a cast-in-place concrete, cut and cover, double-cell box.