Photo collage of Prop K projects


Prop K Capital Program Summary graph

Whether you are a San Francisco resident, student, worker, or visitor, it is likely you have already experienced a Prop K-funded transportation improvement. Prop K is a half-cent local sales tax for transportation that was approved by San Francisco voters in November 2003 that is used to fund everything from signals to streetcars, bicycles to boulevards, and pedestrian safety improvements to paving. Projects like these are identified in the Prop K Strategic Plan’s associated 5-Year Prioritization Programs (5YPPs). About every four years the Transportation Authority updates the Prop K Strategic Plan and 5YPPs. Starting in 2013 and continuing through 2014, we worked with project sponsors (e.g. SFMTA, DPW, BART) to identify five years' worth of projects to fully or partially fund with Prop K sales tax. In 2014, the Transportation Authority Board approved updates all 21 of the Prop K 5YPPs. See the approved 5-year project lists, or visit the MyStreetSF interactive project map.

Each Strategic Plan update has a slightly different focus reflective of the particular context at the time of development. Timing of the 2014 Strategic Plan allows the Prop K program to be responsive to recent plans and initiatives, including the Regional Transportation Plan/Sustainable Communities Strategy, Muni Forward/Implementation of the Transit Effectiveness Program, WalkFirstVision Zero, and the San Francisco Transportation Plan (SFTP), which was adopted by the Board in 2013.

The 2014 Strategic Plan (informed by the 5YPPs) and the SFTP have an especially close relationship: the 2014 update serves as the Early Action Program for the SFTP, directing revenues toward the first five years of investments included in the 30-year SFTP. The Early Action Program uses the Prop K half-cent transportation sales tax and its ability to leverage federal, state, and other funds to direct hundreds of millions of dollars toward SFTP investments in every mode and every part of the City in the next five years. As we have highlighted during the 5YPP approval process, Prop K funds are advancing key initiatives and recommendations from the SFTP from creation of the Neighborhood Transportation Improvement Program to the Freeway Corridor Management Strategy to the Bay Area Transit Core Capacity Study.

See more information on the Neighborhood Transportation Improvement Program.


In November 2003, 75% of San Francisco voters approved Prop K, extending the existing half-cent local sales tax for transportation (Prop B, approved in 1989) and approving a new 30-year Expenditure Plan identifying projects and programs to be funded by the sales tax. At the time of approval, Prop K was forecast to generate $2.35 billion (in year 2003 dollars) in revenue over 30 years and to leverage or match close to $10 billion in federal, state, and other local funds to fully fund the projects and programs identified in the Expenditure Plan. Currently, Prop K generates about $100 million annually in revenue. The sales tax generated is invested in projects and programs contained in four major categories, which are shown below along with the percentage of overall Prop K revenues that each category will receive over the life of the Expenditure Plan:

  • Transit: 65.5%
  • Paratransit: 8.5%
  • Streets and Traffic Safety: 24.6%
  • Transportation Systems Management/Strategic Initiatives: 1.3%

The Expenditure Plan includes a list of named major capital projects (e.g. Central Subway, Caltrain Downtown Extension to a Rebuilt Transbay Terminal, Caltrain Electrification, and Replacement of Doyle Drive) and 21 programmatic categories comprised of typically smaller projects ranging from street resurfacing to new traffic signals and signs to pedestrian safety/circulation improvements to transit vehicle replacements. The Expenditure Plan identifies eligible sponsors for each of the large transportation projects as well as the programmatic categories and it sets the maximum amount of sales tax funds available to each project or program. However, the Expenditure Plan does not specify in which years projects will receive funds, nor does it detail the specific projects to be funded from programmatic categories in a given year.

The Prop K Strategic Plan, adopted by the Transportation Authority Board, guides the day-to-day implementation of the Prop K program.  It provides a timeline for collection of Prop K revenues, matches this with the schedule for when project sponsors need those revenues to deliver projects, sets policy for the administration of the program to ensure prudent stewardship of the funds, and provides a solid financial basis to justify the issuance of future debt to advance delivery of the Expenditure Plan projects so the public can enjoy the benefits sooner.

Concurrent with development of the Strategic Plan, the Transportation Authority developed and adopted5-Year Prioritization Programs for each of the 21 programmatic categories. The 5-Year Prioritization Programs each include a transparent prioritization methodology to identify projects that should receive Prop K funds, a five-year list of projects to be funded from the programmatic category including scope, schedule, cost, and funding information for Prop K and other revenues, and performance measures. The Strategic Plan and the 5-Year Prioritization Programs were updated in 2009 and 2014 to incorporate revised revenue projections and new 5-year project lists.

Click on the links below to find more information:


Download the latest Prop K Fact Sheet.


Phone: 415.522.4800
Fax: 415.522.4829

San Francisco County Transportation Authority
Attention: Policy & Programming Division
1455 Market St., 22nd Floor
San Francisco, CA 94103