BART Silicon Valley Phase II Extension Project: 2026 Status, Cost & Route Map
The BART Silicon Valley Phase II Extension Project is a 6-mile regional transit expansion extending passenger rail from Berryessa/North San José to Santa Clara, California. Managed by VTA in partnership with BART and the FTA, this mega-infrastructure initiative features a 5-mile single-bore tunnel beneath the central business district. Funded through local Measure B sales taxes and federal IIJA grants, the project creates a seamless transbay rail link connecting the East Bay to major South Bay employment hubs. Official plans and environmental review documentation outline an alignment following existing railroad right-of-way and urban arterial corridors. Incorporating four new stations including a major multimodal hub at San José Diridon Station, the project enhances regional mobility across Silicon Valley. The route map establishes vital public transit connections to Caltrans corridors, Amtrak, and Caltrain, with a target completion date aimed at transforming urban transit accessibility.
Project information is compiled from official agency documents, federal records, environmental reviews, and verified public announcements.
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Bart Silicon Valley Phase Ii Extension Project Route Map & Alignment
View and download the latest Bart Silicon Valley Phase Ii Extension Project route map showing the project alignment, major junctions, regions covered and connectivity corridors.
Statewide Network System Phases
| Phase | Route Alignment | Length | Current Status |
|---|---|---|---|
| Phase II | Berryessa/North San José to Santa Clara | 6 miles | Under Construction |
Active Construction Packages
| Package | Section Covered | Contractor | Progress / Status |
|---|---|---|---|
| CP1 | Systems and Line-Wide Works | In Procurement | Procurement |
| CP2 | Tunnel and Trackwork | Kiewit Shea Traylor JV | Under Construction |
| CP3 | Newhall Yard and Santa Clara Station | In Procurement | Procurement |
| CP4 | 28th Street/Little Portugal Station | In Procurement | Procurement |
Major Stations & Multi-Modal Interchanges
28th Street/Little Portugal Station
Under ConstructionInterchange: VTA Bus
Downtown San José Station
Under ConstructionInterchange: VTA Light Rail, VTA Bus
Diridon Station
Under ConstructionInterchange: Caltrain, Amtrak, ACE, VTA Light Rail
Santa Clara Station
Under ConstructionInterchange: Caltrain, Amtrak
Key Engineering Structures & Viaducts
5-Mile Single-Bore Tunnel
A 43-foot diameter single-bore tunnel constructed via tunnel boring machine to house double tracks and station platforms underground.
Key Project Milestones Timeline
Record of Decision
FTA issued the Record of Decision completing the environmental review process.
CP2 Contract Execution
VTA awarded the Tunnel and Trackwork progressive design-build contract to Kiewit Shea Traylor JV.
FTA Funding Commitment
FTA executed the Full Funding Grant Agreement providing federal financial support.
Target Revenue Service
Anticipated completion date for full passenger revenue service.
Latest Project Developments
The Bart Silicon Valley Phase Ii Extension Project construction and engineering execution continue to progress across monitored project packages under the direction of VTA.
Civil contractors and agency engineers are executing earthworks, structural deck installations, utility relocations, and system integration testing to ensure adherence to safety and operational schedules.
Bart Silicon Valley Phase Ii Extension Project– Cost • Route • Timeline
| Parameter | Technical Details |
|---|---|
| Project Name | Bart Silicon Valley Phase Ii Extension Project |
| Country / Geography | USA |
| Region / Corridor | California |
| Executing Agency | VTA |
| Route Designation | BART Silicon Valley Corridor |
| Funding Model | FTA New Starts Grant & Local Measure B Sales Tax |
| Project Type | Heavy Rail Transit Extension |
| Total Length | 6 miles |
| Estimated Cost | $12.7B |
| Land Acquisition (%) | 85% |
| Construction Progress (%) | 15% |
| Expected Completion | 2037 |
Impact Zone: Affected Settlements
Places, towns, and villages located within the 1.5 km and 500m buffer corridors, as well as road crossing nodes along the project's alignment, identified via OpenStreetMap spatial analysis.
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Latest Bart Silicon Valley Phase Ii Extension Project News & Developments (2026)
News Timeline (0 Articles)
Bart Silicon Valley Phase Ii Extension Project Video Updates
Frequently Asked Questions (FAQ)
The Bart Silicon Valley Phase Ii Extension Project is a major infrastructure project in the United States, forming part of the national infrastructure development program.
The Bart Silicon Valley Phase Ii Extension Project is considered critical infrastructure for improving regional connectivity, reducing travel times, and supporting economic growth in the project corridor.
The target completion date for the Bart Silicon Valley Phase Ii Extension Project is 2037. Completion may occur in phases as individual sections are finalized.
The estimated project cost for the Bart Silicon Valley Phase Ii Extension Project is $12.7B. Cost figures are subject to revision based on scope adjustments and procurement outcomes.
Funding for the Bart Silicon Valley Phase Ii Extension Project comes from a combination of federal government allocations, state contributions, and where applicable, public-private partnership arrangements. Specific funding breakdowns are disclosed in official project documentation.
The Bart Silicon Valley Phase Ii Extension Project is implemented by VTA. Project oversight, funding disbursement, and construction monitoring are shared across these agencies.
The current status of the Bart Silicon Valley Phase Ii Extension Project is: Under Construction. Construction progress and key milestones are tracked and updated regularly on this page.
The most recent developments for the Bart Silicon Valley Phase Ii Extension Project are listed in the Latest Developments section on this page. Information is compiled from official agency announcements and verified public records.
The Bart Silicon Valley Phase Ii Extension Project spans approximately 6 miles.
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