Passengers Loading and Unloading in Street on L Taraval Line

Photo credit: SFMTA Photography Department


The Transportation Authority is conducting the District 4 Mobility Study to explore ways to increase the use of non-automobile modes in the Outer Sunset and Parkside neighborhoods. This study aims to improve health, livability, and economic vitality in District 4 while addressing climate change at the local level. 

Past studies have shown that one of the main ways residents of District 4 get around is by driving alone. Reducing single occupancy vehicle use would provide a number of benefits for the district, as decreased vehicle miles traveled correlates with increased safety for all road users and results in lower greenhouse gas emissions. More people walking, biking, and taking transit would reduce congestion and support the local economy by making it easier for residents and visitors to access commercial districts. 

This study will explore how District 4 residents get around, identify trips that have high shares of single-occupancy vehicle trips, and explore short and medium-term strategies to reduce these drive-alone trips. 

District 4 Supervisor and Transportation Authority Board Member Gordon Mar asked the Transportation Authority to conduct this study as part of its Neighborhood Program.

Solutions that may be developed include:

  • Bicycle or pedestrian improvements
  • Transit enhancements or circulator services
  • Piloting new mobility services
  • Commute alternative programs

The study is part of Sunset Forward, a collaboration between the Office of District 4 Supervisor and Transportation Authority Board Member Gordon Mar, the San Francisco Planning Department, the San Francisco County Transportation Authority, and the District 4 Youth and Families Network, a coalition of non-profit community based-organizations in the Sunset District.

District 4 Mobility Study Solutions

Exploring Great Highway Alternatives

For one of the potential solutions for the study, staff is exploring long-term alternative configurations of the Great Highway from Sloat Boulevard to Lincoln Way. This work includes conducting data collection and traffic modeling to evaluate transportation impacts of alternatives, as well as identifying street and network changes that would complement each potential alternative.
This segment of roadway is temporarily closed during the City of San Francisco shelter-in-place order to allow socially distant recreational use of the Great Highway. For more information, related to the temporary closure

Neighborway Network in District 4

Another solution being explored is a network of neighborways to serve the Outer Sunset and Parkside neighborhoods. Neighborway projects focus on improving residential streets by calming vehicle traffic, making them easier to navigate and friendlier for walking and biking. They will combine street design measures tailored to each neighborhood, including speed humps, traffic circles, crosswalk upgrades and restrictions on thru traffic.

Additional solutions are currently being developed. 

Project/Study Partners

The Transportation Authority will conduct the District 4 Mobility Study in partnership with SFMTA. 

Timeline and Status 

October 2019 - Summer 2020
Review past efforts, analyze data, identify goals and challenges

Fall/Winter 2020
Community outreach, develop solutions

Spring 2021
Final recommendations, final report

Cost and Funding 

This project was funded by the Transportation Authority’s Neighborhood Program at the request of District 4 Supervisor and Transportation Authority Board Member Gordon Mar. SFMTA work will be supported by the General Fund. 


Camille Guiriba, Senior Transportation Planner

Public engagement

The District 4 Mobility Study team will work with community organizations, business groups, and the general public to develop recommendations to improve health, livability, and economic vitality in the neighborhood. 

In partnership with the District 4 Office of Supervisor Gordon Mar, we have launched a survey to gather community input on the long term future of the Great Highway.


Take the survey:  

The survey is open through Friday, January 8, 2021 (this survey is now closed)

  • For English: Text “Great Highway” to 415-358-0017 
  • For Spanish: Text “Gran Carretera” to 415-358-0017 
  • For Simplified Chinese: Text “伟大公路”  to 415-358-0017 
  • For Filipino: Text “Mahusay na Highway” to 415-358-0017

Don't use text? You can also take the survey online here.

Previous events:

Project staff led a virtual town hall on November 21, 2020 (the future of the Great Highway).

Project staff led a virtual town hall on May 23, 2020. 

Want to get updates about the study? Enter your email below on this page.

Want a presentation about the study? Email d4mobility@sfcta.org to request a presentation for your group



Reports & documents

See below for previous reports pertaining to transportation in District 4.

Get email updates on this project

Related programs

San Francisco's voter-approved Transit-First Policy states that decisions regarding the use of our public streets and sidewalks shall prioritize public rights of way for pedestrians, bicyclists, and public transit.

Our Neighborhood Program supports neighborhood-scale planning efforts and project implementation in each supervisorial district.

Replacing car travel with more sustainable modes will reduce greenhouse gas emissions and create a healthier environment for San Francisco residents, workers, and visitors.