Transportation Authority Approves US101/I-280 Freeway Study, Next Steps

Image of cars and a bus on the freeway with the city of San Francisco in the background

San Francisco’s transportation system faces a critical problem: more people than ever are trying to travel to, from, and through the city. By 2040, there will be more than 100,000 additional daily trips between San Francisco and the South Bay.

The Transportation Authority has released a study on how carpool or express lanes could help address this growing challenge. Our study found that an express lane with a three-person minimum carpool requirement could help move more people along the 101 corridor and improve reliability. Our project team will take this recommendation, as well as other options and an equity analysis, into subsequent study phases in partnership with Caltrans, San Mateo County, and other regional partners.

Learn more and download the report (PDF).

What's happening: Updates from our monthly newsletter

Market Street with transit

Check out our latest newsletter, featuring... 

  • Transportation Authority to update Downtown congestion pricing study

  • Improved safety, access for Balboa Park BART and Muni riders

  • More protected bike lanes, traffic calming improvements coming to Valencia Street

  • And more

Want to get monthly updates from us in your inbox? Click here to sign up for our monthly newsletter. 


School kids cross Church Street in the rainNTIP logo

The Neighborhood Transportation Improvement Program funds community-based neighborhood-scale planning efforts, especially in underserved neighborhoods and areas with vulnerable populations (e.g. seniors, children, and/or people with disabilities).

The program was developed in response to mobility and equity analysis findings from the San Francisco Transportation Plan, the city’s 30-year blueprint guiding transportation investment in San Francisco, and the Transportation Authority Board's desire for more focus on neighborhoods, especially on Communities of Concern and other underserved neighborhoods.

The transportation plan found that walking, biking and transit reliability initiatives are important ways to address socio-economic and geographic inequities.

The Neighborhood Transportation Improvement Program is made possible by the Transportation Authority through grants from San Francisco's half-cent sales tax for transportation.

Click here for more information on projects in each district.

MyStreetSF Projects Map

MyStreetSF Projects MapFrom signals to streetcars, bicycles to boulevards, from pedestrian safety to paving, the Transportation Authority provides funding for hundreds of transportation projects citywide.

The MyStreetSF interactive map shows projects currently underway, proposed, and recently completed that are funded by, or prioritized for funding by the Transportation Authority, as well as those for which the we provide some level of oversight, in our role as San Francisco's Congestion Management Agency.  READ MORE

About the San Francisco County Transportation Authority

Created in 1989, the Transportation Authority is responsible for long-range transportation planning for the city, and it analyzes, designs and funds improvements for San Francisco's roadway and public transportation networks.

The Transportation Authority administers and oversees the delivery of the Prop K half-cent local transportation sales tax program. It also serves as the designated Congestion Management Agency for San Francisco under state law, and acts as the San Francisco Program Manager for grants from the Transportation Fund for Clean Air.

The Transportation Authority was designated Treasure Island Mobility Management Agency in 2014, charged with planning for sustainable mobility on Treasure Island, coordinating new ferry and regional bus service, on-island shuttle, bike share, and car share opportunities. Read more

SFCTA YouTube video link Transparent spacer image
We work with San Francisco residents, transit providers, and other government agencies to plan, fund and deliver critical transportation projects and programs citywide.   

Additional Resources

Looking for something in particular? Try our search bar at the top left of this page, or check out these quick links.