Alemany Interchange Bike Lanes Project
The Alemany Interchange Bike Lanes Project proposes striping changes for more safe biking and walking conditions through the “Alemany Maze” including new buffered bike lanes, flexible delineator posts to separate the bikeways from vehicles, high visibility crosswalks and hatched shoulders and narrowed travel lanes to reduce speeding. The project also proposes a buffered bike lane southbound on San Bruno Avenue from Alemany Boulevard to Silver Avenue. SFMTA staff anticipate no changes to parking from these improvements. The SFMTA Board of Directors will consider this proposal at their August 21, 2018, meeting.
The “Alemany Maze,” where U.S. 101, I-280, Alemany Boulevard, Bayshore Boulevard, San Bruno Avenue, and several other local streets intersect, has long acted as a barrier between the adjacent communities of the Portola, Bernal Heights, Silver Terrace, and the Bayview. The SFMTA and the San Francisco County Transportation Authority's Neighborhood Transportation Improvement Program (NTIP) have partnered to deliver a set of safety and access improvements for people walking, biking, and driving through the Maze. The first phase of the project will be implemented in fall 2018 upon approval by the SFMTA Board of Directors.
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, are all on the San Francisco High-Injury Network. Designated by the City’s Vision Zero initiative, High-Injury Corridors make up 13% of City streets with 75% of severe and fatal traffic related collisions. Future area improvements include a multi-use path and new signalized crosswalks to allow people to safely walk from San Bruno Avenue to the Alemany Farmers Market.
Additional background on this project can be found on the San Francisco County Transportation Authority's Alemany Interchange Improvement Study.
Alemany Interchange Proposed Improvements
The Alemany Interchange Bike Lanes Project proposes several improvements designed for more safe walking, biking and driving conditions through the “Alemany Maze.” Key elements of the project include:
- New protected bike lanes on Alemany Boulevard between Putnam Street/I-280 N off-ramp and Bayshore Boulevard
- Flexible delineator posts in the buffer space along the bikeways to separate the people on bicycles from motor vehicles
- Hatched shoulders and narrowed vehicle lanes to slow vehicle speeds on Alemany Boulevard
- High-visibility crosswalk striping and new roadway markings to clarify vehicle movements on Alemany Boulevard
- A new buffered bike lane southbound on San Bruno Avenue from Alemany Boulevard to Silver Avenue (an existing SF Bicycle Route)
You can see current proposed striping for the Alemany Interchange Bike Lanes Project here.
SFMTA staff anticipate no changes to parking from these improvements. The SFMTA Board of Directors will consider this proposal at a hearing on Tuesday, August 21, 2018, at 1:00 PM in Room 400, City Hall.
San Bruno Avenue Bike Lane Proposal
This spring, the SFMTA proposed to expand the scope of the Alemany Interchange Bike Lanes Project to include a painted a buffered bike lane southbound on San Bruno Avenue from Alemany Boulevard to Hale Street. "Sharrow" shared lane markings would be added to the block from Hale Street to Silver Avenue to guide people on bikes to the existing Silver Avenue bike route. The addition of the San Bruno Avenue bike lane will improve bicycle lane connections in the area without increasing traffic congestion or removing parking.
Key information about the proposed southbound buffered bike lane on San Bruno Ave between Silver Ave and Alemany Blvd:
- Street space for the southbound bicycle lane will come from narrowing the existing wide travel lanes - no lanes will be removed
- The bike lane will not affect existing on-street parking
- The bike lane will not slow or change the northbound 8 - San Bruno Muni bus operations or bus stops
Proposed striping for San Bruno Avenue can be reviewed here.
This project is funded locally from Proposition B General Fund and Proposition K Half-Cent Sales Tax for Transportation.