Highway 85 (California)

Highway 85 (California)
State	CA
Type	SR
Route	85
Alternate name	West Valley Freeway
Length mi	24.53
Established	1964
Direction a	South
Terminus a	Santa Cruz Mountain foothills near Los Gatos
Direction b	North
Terminus b	in Mountain View
Counties	Santa Clara County

Contents

Highway 85 (California) is a 24.53-mile state highway in Santa Clara County running from near Los Gatos to Mountain View. Known locally as the West Valley Freeway, the route connects suburban communities including Saratoga, Cupertino, Sunnyvale, and Santa Clara while providing a bypass of central San Jose between Interstate 280 and U.S. Route 101. The freeway serves major employers and institutions such as Apple Inc., Intel, Google, Stanford University, and NASA Ames Research Center and interfaces with transit systems like Caltrain, VTA, and Bay Area Rapid Transit.

Route description

Highway 85 begins near the Santa Cruz Mountains foothills at an interchange with State Route 17 and Interstate 280 in the vicinity of Los Gatos, passing northward adjacent to Vasona Lake County Park and Saratoga Gap before entering the suburban valley that contains Saratoga and Monte Sereno. The freeway proceeds north along a corridor parallel to local arterials such as El Camino Real and Stevens Creek Boulevard, intersecting major streets near Cupertino by the Apple Inc. campus and the De Anza College area, then serving Sunnyvale and Santa Clara with interchanges near Lawrence Expressway, Central Expressway, and Great America Parkway adjacent to Levi's Stadium and California's Great America. The northern terminus connects to U.S. 101 and provides access to Mountain View and Palo Alto via surface streets and ramps that serve Moffett Field and Shoreline Amphitheatre.

The concept for Highway 85 emerged from postwar planning in Santa Clara County and regional studies by agencies like the California Department of Transportation and the San Francisco Bay Area Rapid Transit District during the 1950s and 1960s, as part of a network that included I-280, I-680, and US 101. Initial segments opened in phases during the 1960s and 1970s, with extensions and interchange reconstructions completed through the 1980s and 1990s to serve growth driven by companies such as Hewlett-Packard, Sun Microsystems, and Lockheed Martin. The corridor was redesignated and improved under state legislation affecting California's highway system and saw major widening projects in the 2000s involving contractors, county boards of supervisors, and transit advocates including the Santa Clara Valley Transportation Authority. Construction of HOV lanes, interchange reconfigurations, and soundwall installations addressed environmental reviews led by the California Environmental Protection Agency-related agencies and compliance with laws like the National Environmental Policy Act and the California Environmental Quality Act.

Planned improvements have been coordinated among entities such as the Santa Clara Valley Transportation Authority, the Metropolitan Transportation Commission, and local city governments including Mountain View and Cupertino. Projects often focus on interchange upgrades at junctions with I-280 and US 101, managed lanes or express lanes concepts influenced by implementations on I-680 and I-880, and multimodal integration with Caltrain electrification and VTA bus rapid transit proposals. Environmental mitigation and community outreach draw stakeholders such as Silicon Valley Leadership Group, League of California Cities, and regional jurisdictions. Long-range plans consider impacts from developments by firms like Tesla, Inc., Meta Platforms, and campus expansions at Stanford University and NASA Ames Research Center, with funding strategies including measures similar to county sales tax measures previously approved by voters and federal discretionary grants from the Federal Highway Administration.

The freeway includes interchanges serving numerous arterials and highways: the southern junction with SR 17/I-280 near Los Gatos; connections to Saratoga via local streets; ramps for Stevens Creek Boulevard near Cupertino and the De Anza College area; interchanges at Lawrence Expressway and San Tomas Expressway in Santa Clara; access to Great America Parkway and Tasman Drive near California's Great America and Levi's Stadium; and the northern termini linking to US 101 for Palo Alto and Mountain View. Auxiliary ramps provide connections to municipal roads leading to Moffett Federal Airfield and regional centers like Sunnyvale Town Center and Santana Row.

Traffic volumes on the corridor reflect commuting patterns tied to employers including Google, Apple Inc., Intel, NVIDIA, and Adobe Inc., producing peak-period congestion reminiscent of other Silicon Valley corridors such as I-280 and US 101. Safety initiatives have involved installation of enhanced signage meeting Federal Highway Administration standards, interchange geometry improvements influenced by research at University of California, Berkeley and Stanford University, and enforcement coordination with the California Highway Patrol. Congestion management programs by the Santa Clara Valley Transportation Authority promote transit options like Caltrain and VTA connections, while regional planning bodies including the Association of Bay Area Governments track collision statistics and implement countermeasures in partnership with county public works departments and state agencies.

Highway 85 interfaces with principal routes and facilities: SR 17/I-280 at the southern end, arterial interchanges serving Saratoga, Cupertino, Santa Clara, and Sunnyvale, connections with Central Expressway and Lawrence Expressway, proximity to De Anza College, Levi's Stadium, California's Great America, and northern linkage to US 101 toward San Francisco and San Jose. Transit interfaces include crossings over or near Caltrain corridors, adjacency to VTA routes, and access to regional nodes such as Mountain View Transit Center and San Jose Diridon Station.

Category:State highways in Santa Clara County, California Category:Freeways in the San Francisco Bay Area