Alemany Interchange Improvement Study

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Alemany Interchange Proposed Striping Plan

Alemany Interchange Multi-use Path


The Alemany Interchange Improvement Study was adopted by the Transportation Authority board in April, 2017. Download a PDF of the final report.

The current project Fact Sheet is available for download in several languages:

Map downloads

Download the two maps at right as an 8-1/2" x 11"  PDF, which you can zoom in on for greater detail using Acrobat Reader. Also available is the Striping Plan as 11" x 17".


To comment on the project and the design options, contact Rachel Hiatt, Principal Planner, at or 415.522.4809.


The Alemany Interchange, where U.S. 101, I-280, Alemany Boulevard, Bayshore Boulevard, San Bruno Avenue, and several other local streets intersect, presents major challenges to pedestrian and bicycle safety and accessibility. Together with hilly topography, the freeways act as barriers between the surrounding neighborhoods with few locations where they can be crossed. The interchange has the potential to provide critical connections between the adjacent communities of Bernal Heights, the Portola, Silver Terrace, and the Bayview, as well as destinations beyond. However, pedestrians, bicyclists, and transit riders seeking to reach these communities must navigate a circuitous maze of high-speed streets and ramps.

Safety is a significant issue in the interchange area, with several severe-injury or fatal collisions having occurred on the streets in and near the interchange in recent years. The Alemany Boulevard, San Bruno Avenue, and Bayshore Boulevard corridors, which converge at the Alemany Interchange, have all been designated by the City’s Vision Zero initiative as Pedestrian High Injury Corridors. Please see the project's Prop K Allocation Request Form for more information.


Neighboring communities, led by the Portola Neighborhood Association (PNA), developed two specific proposals that would improve multimodal connectivity and safety by providing pedestrian and bicycle connections through the interchange:

  • New north-south pathway for pedestrians and bicyclists, connecting San Bruno Avenue to the Alemany Farmer's Market. The proposed multi-use path would provide a direct access from Alemany Farmer’s Market to other nearby neighborhoods. This improvement would also include a new crosswalk and traffic signal, which would increase safety and accessibility for pedestrians and bicyclists who are traveling from the Alemany Farmer’s Market to the intersection of Alemany Boulevard and San Bruno Avenue.
  • New bicycle lanes along Alemany Boulevard between Putnam Street and Bayshore Boulevard. The proposed buffered bicycle lane would increase safety and eliminate a gap between Putnam Street and Bayshore Boulevard. This improvement also includes curb extensions to realign and reduce vehicle speed at the intersection which would increase safety throughout this interchange.


The SFCTA project team is actively conducting community outreach at the Portola neighborhood and surround communities.

During the first round of outreach conducted in March 2016, the project team received feedbacks from various community groups and stakeholders on proposed improvements. The project team has addressed all the feedbacks and currently is presenting at the community and stakeholder meetings as well as at the other events such as Alemany Farmer's Market.  Multi-lingual notifications and materials are prepared to reach the diverse populations of the surround neighborhoods. 


Alemany Interchange Improvement Study Timeline


Alemany Farmers' Market in 1953Check out a recent post in Streetsblog SF highlighting the project. Citizens Advisory Committee Chair Chris Waddling is quoted as saying:

"The inability to walk directly and safely from the Portola to the Alemany Farmers' Market has been a vexing problem since the freeway was built in the “car is king” era. Today, as evidenced by the hundreds of pedestrian trips across the median and Alemany itself during breaks in traffic, it’s obvious that people want a pedestrian alternative to driving to the market."


Commissioner Campos (District 9) has designated NTIP funding to support the Alemany Interchange Improvement Study led by the Transportation Authority.

Caltrans District 4 and San Francisco Municipal Transportation Agency (SFMTA) are coordinating closely with the Transportation Authority as partners in the study.


For more information on this project contact Priyoti Ahmed, Transportation Planner, at or 415.522.4819.

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Farmers' Market photo courtesy Todd Lappin via flickr Commons.