San Tomas Expressway

San Tomas Expressway is a major arterial and limited-access highway in Santa Clara County serving San Jose, Santa Clara, Sunnyvale, and Cupertino. The corridor connects regional routes such as Interstate 280, State Route 85, and U.S. Route 101, and parallels transit corridors like the VTA Metro Light Rail and Caltrain. It functions as a multimodal spine for commuter, freight, and local traffic in the South Bay tech and residential districts that include landmarks such as San Jose International Airport and Apple Park.

Route description

San Tomas Expressway begins near Mabury Road and continues north through San Jose adjacent to Stevens Creek Boulevard, intersecting major thoroughfares including I-280, Stevens Creek Boulevard, El Camino Real, and Homestead Road. The route traverses zones near Santa Clara University, Levi's Stadium, and industrial areas close to San Jose Diridon Station, passing parks such as Rinconada Park and Triton Museum of Art and running parallel to waterways including San Tomas Aquino Creek. Northward, it crosses into Sunnyvale near Fair Oaks Avenue and continues toward Cupertino, terminating near intersections with Stevens Creek Boulevard and local connectors to De Anza College and I-280. Along the corridor, land use mixes residential neighborhoods like Willow Glen, commercial centers such as Westfield Valley Fair, and corporate campuses occupied by Intel, Google, and Apple Inc. affiliates.

History

The corridor traces origins to early 20th-century routes serving orchards and rail spurs near Southern Pacific Railroad rights-of-way and agricultural tracts in Santa Clara Valley. Postwar suburbanization linked the route to regional planning by agencies including the Santa Clara Valley Transportation Authority and county public works departments that upgraded segments during the Interstate Highway System era and the growth of Silicon Valley. Major reconstruction in the 1970s and 1980s introduced grade separations influenced by projects like I-880 in California expansions and local ballot measures similar to Measure A (Santa Clara County). Subsequent safety and capacity projects in the 1990s and 2000s responded to commute pressure from employers such as Cisco Systems, Hewlett-Packard, and Oracle Corporation and coordinated with transit investments such as Caltrain Modernization Program and VTA Light Rail Modernization.

Major intersections

Key junctions include the interchange with Interstate 280 near Cupertino and San Jose, at-grade crossings with Stevens Creek Boulevard providing access to Westfield Valley Fair, the intersection with El Camino Real servicing Santa Clara and Stanford University travelers, and connections to State Route 85 and U.S. Route 101 that link to metropolitan centers including Oakland and San Francisco. Additional notable crossings include Homestead Road near De Anza College, Mathilda Avenue adjacent to Sunnyvale, and local arterials serving neighborhoods like Alviso and business parks near North San Jose.

Transportation and transit services

The corridor is served by multiple agencies including the Santa Clara Valley Transportation Authority, Caltrans, and private shuttles operated by technology companies such as Google, Apple Inc., and Meta Platforms. Bus routes link to hubs like Diridon Station, Santa Clara Transit Center, and Mountain View Station, integrating with Caltrain and BART Silicon Valley extension planning. Bicycle infrastructure connects to regional networks such as the San Tomas Aquino Creek Trail and Stevens Creek Trail and interfaces with active-transportation initiatives including those championed by County of Santa Clara Office of Bicycle and Pedestrian Planning. Freight access supports last-mile distribution for companies using terminals near San Jose International Airport and industrial parcels close to South Bay Freeway corridors.

Future developments and improvements

Planned improvements involve coordinated projects by Santa Clara Valley Transportation Authority and Caltrans to address safety, multimodal access, and congestion relief, aligning with regional plans like Plan Bay Area and climate initiatives endorsed by the Association of Bay Area Governments. Projects under study include intersection redesigns, grade-separation feasibility mirroring work on SCVTA Guadalupe Corridor, enhanced bus rapid transit links similar to VTA Rapid Transit Project proposals, and expanded active-transportation elements linking to San Francisco Bay Trail. Funding and phasing may draw on sources comparable to local transportation measures and federal programs such as the Congestion Mitigation and Air Quality Improvement Program.

Category:Streets in San Jose, California Category:Transportation in Santa Clara County, California