SM 101 Express Lanes Project

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Getting More Passengers through the Busy Corridor

Project Information

The San Mateo 101 Express Lanes Project is a multi-year, multi-agency project initiated to reduce traffic congestion and encourage carpooling and transit use on U.S. 101 in San Mateo County.

The project will create 22 miles of express lanes on U.S. Highway 101 from I-380 in San Bruno to the San Mateo County/Santa Clara County border. The San Mateo 101 Express Lanes will then seamlessly connect to the express lanes being constructed in Santa Clara County.

101 Project Map

Key Project Benefits:

  • Encourages carpooling and transit use
  • Improves travel time and reliability for all express lane users
  • Increases the total number of people moved on the road
  • Uses technology to manage traffic flows
  • Reduces congestion in the corridor
  • Upgrades pavement and lane re-striping

Project Links

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