Dumbarton Forward | Operate + Coordinate | Our Work

Dumbarton Forward

Low angle view of the Dumbarton Bridge with the Dumbarton Forward logo on top
John Huseby
Wednesday, October 28, 2020

The Dumbarton Forward initiative will implement a suite of near-term operational and multimodal strategies to address traffic flow, congestion and person-throughput in the State Route (SR) 84 - Dumbarton Bridge - Bayfront Expressway Corridor between I-880 in Fremont and Marsh Road in Menlo Park. The proposed improvements support modes of travel other than single-occupancy vehicles, including strategies to encourage transit use. The specific components of the Dumbarton Forward initiative include:

  • Part-Time Bus-Only Lane: A multi-year pilot to allow authorized bus operators to bypass peak period congestion, resulting in improved transit reliability.
  • Dumbarton Bridge Toll Plaza Operational Improvements: Improvements to accommodate bus movements without stopping at the toll plaza. Other improvements include the activation of the metering lights to better manage traffic downstream of the toll plaza.
  • Traffic Signal Improvements: Bayfront Expressway intersection improvements, including transit signal priority, bus queue jump lanes and an adaptive traffic signal system to reduce delays at the signals.
  • SR-84 Off-Ramp Improvements: Eastbound SR 84 / Thornton Avenue off-ramp reconfiguration to accommodate an additional left-turn lane for added capacity and vehicle storage.
  • Transit Improvements: Improve bus service on transbay routes - AC Transit, Stanford and Union City Transit.
  • 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

For more information, contact Linda Lee at llee@bayareametro.gov.

Key Partners and Stakeholders

Key Partners

  • Caltrans
  • California Highway Patrol
  • Alameda-Contra Costa Transit District (AC Transit)
  • Stanford University
  • Facebook

Key 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


Dumbarton Forward Strategies Map

Dumbarton Forward Strategies Map

Dumbarton Forward Project Map

Dumbarton Forward Project Map

Part-time Bus-Only Lane Goals:

  • Move more people in fewer cars
  • Offer travel time savings that can incentivize mode shift to buses
  • Support public and private express bus and shuttle operations
  • Connect regional employment centers and transit hubs

Estimated Project Costs

Project Initiation Documentation (PID) $0.7 million
Project Approval and Environmental Document (PA&ED) $1.1 million
Plans, Specs & Estimate (PS&E) $1.9 million
Construction Management $2.0 million
Construction $10.0 million
TOTAL $15.7 million

Project Schedule

Project Initiation Documentation (PID) - Completed Fall 2019
Project Approval and Environmental Document (PA&ED) Late 2020
Plans, Specs & Estimate (PS&E) Spring 2021
Advertise & Award Fall 2021
Construction Late 2022