Dumbarton Forward
Dumbarton Forward is a set of near-term strategies to improve efficiency and reduce delays on and near the Dumbarton Bridge.
Dumbarton Forward aims to limit traffic congestion during peak periods in the State Route 84-Dumbarton Bridge-Bayfront Expressway corridor between Interstate 880 in Fremont and Marsh Road in Menlo Park.
Dumbarton Forward encourages commuters to use transit instead of driving in personal vehicles, which improves commute times for all travelers in the area.
Dumbarton Forward Strategies
Bike Access Improvements
To improve safety and connectivity for bicyclists, these improvements focus on completing critical gaps in existing bicycle networks along the corridor.
Staff Contact
Cathy Chea
Email: cchea@bayareametro.gov
Operational Improvements Project
This project will convert the existing outside shoulder on State Route 84/Bayfront Expressway into a part-time bus-only lane during peak commute periods. Key intersections will also receive transit signal priority upgrades aimed at reducing congestion and improving bus travel time reliability across the Dumbarton Bridge corridor.
Staff Contact
Ingrid Supit, Dumbarton Forward Project Manager
Phone: 415-778-6691
Email: isupit@bayareametro.gov
Operational Improvements Project Costs & Schedule
Estimated Project Costs
| Description | Cost |
|---|---|
| Project Initiation Documentation (PID) | $0.8 million |
| Project Approval and Environmental Document (PA&ED) | $1.3 million |
| Plans, Specs & Estimate (PS&E) | $2.2 million |
| Construction Management | $2.0 million |
| Construction | $14.8 million |
| TOTAL | $21.1 million |
Project Schedule
| Description | Timeframe |
|---|---|
| Project Initiation Documentation (PID) - Completed | Fall 2019 |
| Project Approval and Environmental Document (PA&ED) - Completed | September 2023 |
| Plans, Specs & Estimate (PS&E) | Fall 2026 |
| Construction | Summer 2027 |
Part-time bus-only lane goals:
- Move more people in fewer cars
- Make traveling by bus faster, to encourage people to shift away from driving in cars
- Support public and private express buses and shuttles
- Connect regional employment centers and transit hubs
Key Partners
- Caltrans
- California Highway Patrol
- Alameda-Contra Costa Transit District (AC Transit)
- Stanford University
Project Stakeholders
- San Mateo County Transit District (SamTrans)
- Alameda County Transportation Commission
- San Mateo County Transportation Authority
- City of Menlo Park
- City of East Palo Alto
- City of Redwood City
- City of Palo Alto
- City of Fremont
- City of Newark
- City of Union City
- County of San Mateo
- County of Alameda
- City/County Association of Governments of San Mateo County