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Bay Street Road Diet and Cycletrack

Project Introduction

The Bay Street Road Diet and Cycletrack project seeks to improve the safety and comfort of Bay Street between Fillmore and Laguna streets for all roadway users by reducing vehicle speeds.

The Bay Street Road Diet and Cycletrack Improvement project is one part of a comprehensive upgrade of the Bay Street corridor. This is a citywide effort that involves several city agencies. The first phase of the work, which includes upgrading sewer lines and installing new curb ramps in the area, was just completed October 2015. The city has been working to schedule the contractor for the repaving work, which could start as early as November 2015. Once that work is complete by the end of this year, SFMTA will be able to install the upgrades to slow traffic in the area by reducing a lane of traffic and adding a speed hump.

Project Status
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Bay Street

While Bay Street has a posted speed limit of 25 MPH, the surrounding community has noted that high vehicle speeds are prevalent, and that there is a need for safety and traffic calming measures.

Traffic analysis conducted by the SFMTA confirmed these observations, finding that on the segment of Bay Street between Laguna and Fillmore streets, the majority of westbound motor vehicles travelled at 33.2 MPH and the majority of eastbound motor vehicles travelled at 34.3 MPH.


To slow vehicle speeds on this segment of Bay Street and to create a more safe, comfortable travel experience for all road users, the SFMTA is proposing a “road diet” which will reduce Bay Street from two travel lanes in each direction to one travel lane in each direction between Fillmore and Laguna Streets.

Westbound Bay Street would be reconfigured to include one traffic lane, a bicycle lane with a painted buffer, and a parking lane.  The existing center turn lane would remain. 

In the eastbound direction, Bay Street would be reconfigured to include one traffic lane, a back-in angled parking lane, a painted buffer, and a bicycle lane.  The existing, eastbound bicycle lane would be moved to be adjacent to the curb with a painted buffer space between the bikeway and the back-in angled parking lane. 

This design was selected because it narrows the roadway, which should reduce speeding and improve pedestrian safety by shortening the crossing distance at intersections. Slowing speeds and improving safety by narrowing the roadway is especially important given the nearby activity at Marina Middle School, Moscone Recreation Center and Park, Fort Mason and the assisted living facility.

This proposed design also enhances the existing bikeway, making it more comfortable for people with a variety of bicycle comfort levels by providing more separation from moving traffic.


The SFMTA conducted a community outreach period that included a community meeting with local residents and informational materials mailed to nearby residents. 

On September 13, 2013, an SFMTA Transportation Engineering public hearing was held where five people spoke in favor of the proposed project citing concerns with traffic speed, and the safety of people who walk and bike in the project area.

Speed hump ballots were mailed on November 22, 2013 to the fronting properties on Bay Street between Laguna Street and Webster Street.  The returned ballots showed simple majority approval of the proposed speed hump.

On August 15, 2014, an SFMTA Transportation Engineering public hearing was held and there were three members of the public who commented on the proposed traffic changes.  All spoke in favor of the proposed project.

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Contact Information
Cameron Beck