SM 101 - Managed Lanes Project (MLP)

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The California Department of Transportation (Caltrans), as owner and operator of U.S. Highway 101 and Lead Agency under the California Environmental Quality Act (CEQA) and National Environmental Policy Act (NEPA), will prepare a draft environmental document for the above referenced project. The project sponsor is a multi-jurisdictional partnership of the San Mateo County Transportation Authority (SMCTA), City/County Association of Governments of San Mateo County (C/CAG) and the State of California Department of Transportation (Caltrans).

Given the importance of the US 101 Corridor from San Francisco County through San Mateo County and into Santa Clara County, finding a solution to the growing congestion and associated delay has become a high priority.

The Southern Segment of the US 101 Managed Lanes Project would begin at the end of the Santa Clara County Express Lanes at Matadero Creek (PM 51.4) and extend to Whipple Avenue Interchange (PM 6.3) in San Mateo County. The Northern Segment on US 101 is from the Whipple Avenue Interchange in San Mateo County (PM 6.3) to north of the I-380 Interchange (PM 20.8).

The purpose of the proposed project is to provide a continuous lane in each direction on US 101 from the terminus of the Santa Clara County Express Lanes to I-380 in northern San Mateo County. This continuous lane would be managed in real time to achieve maximum efficiency and operations toward the following goals:

  • Reduce congestion in the corridor;
  • Improve travel time reliability for all users;
  • Minimize operational degradation of general purpose lanes;
  • Increase person throughput; and
  • Apply technology and/or design features to implement real time traffic management tools.
With these goals in mind, Project Sponsors are considering a range of alternatives that include a combination of converting existing High Occupancy Vehicle (HOV) lanes to Express Lanes, and the addition of new Express Lanes on US 101 between Whipple Road to the I-380 interchange in San Mateo County. The project scope may include removing or replacing existing auxiliary lanes between interchanges; reconstructing ramp connections to US 101, and installing electronic toll collection infrastructure.

Engineering and traffic studies are underway. Community outreach efforts include a project scoping meeting in Fall 2016 and additional community meetings in Spring 2017

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Contact Information

Physical Address:

California Department of Transportation
District 4
111 Grand Ave
Oakland, CA 94612

Mailing Address:

California Department of Transportation
District 4
P.O. Box 23660
Oakland, CA 94623-0660

General Information:

Phone: (510) 286-4444

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