About Proposition K

SF panorama with Tobor, fog

On November 4, 2003, Proposition K was approved by 75% of San Francisco voters, simultaneously with a new 30-year Transportation Expenditure Plan. The Proposition K plan supersedes, or replaces, the Proposition B plan that was approved by voters in 1989 to collect a one-half of one percent transaction and use to finance transportation improvements for the City and County of San Francisco.

Prop K ballot language. Approved November 4, 2003 (PDF) (Department of Elections Archives)


The Expenditure Plan is a list of transportation projects and programs prioritized for Prop K funding.  These projects and programs are intended to help implement the long-range vision for the development and improvement of San Francisco’s transportation system, as articulated in the San Francisco Long Range Countywide Transportation Plan.

Click for information on how the Expenditure Plan was drafted.


The 2005 Prop K Strategic Plan was approved by the Transportation Authority Board on March 22, 2005.  The 2005 Prop K Strategic Plan delivers the half-cent transportation sales tax to the categories of transportation needs in the Expenditure Plan authorized by voters in November 2003. While the Expenditure Plan established eligible programs and projects, it did not provide any guidance as to the timing of allocation of those revenues over the 30-year life of the Expenditure Plan. The Strategic Plan reconciles the need for funds, resulting from sponsor-generated project schedules, with the expected timing of availability of revenues. It does so by taking into account the schedule for availability of state, federal and other funds beyond Prop K; the Transportation Authority’s debt issuance capacity; the Transportation Authority’s own assessment of the deliverability schedule for proposed projects; and by balancing the costs associated with project escalation versus debt financing. The Strategic Plan also sets policy and provides guidance for the administration of the program, ensuring prudent stewardship of the funds. The Plan recommends a strategy that delivers the voter-mandated Prop K Expenditure Plan early on in its lifespan by significantly expanding the current debt program, but it also lays out a responsible, fiscally constrained road map that retires all debt during the 30-year duration of the Expenditure Plan, while minimizing the cost of funds, ensuring accountability and oversight, exercising solid financial controls and optimizing leveraging of other funds.

2005 Prop K Strategic Plan (does not include tables and appendices for easier downloading)


Click to view or download the Board-approved 5YPPs

Prop K requires the development of 5-Year Prioritization Programs as a condition for receiving allocations in each programmatic (i.e. not project-specific) category in the Expenditure Plan. This requirement applies to about 20 programs such as street resurfacing, signs and signals, traffic calming, and transit enhancements. The Prioritization Programs are intended to provide a stronger link between project selection and expected project performance, and to support on-time, on-budget project delivery, and timely and competitive use of state and federal matching funds. Important elements of the Prioritization Programs  include establishing prioritization criteria, performance measures, identifying projects to be funded in the next 5 years, and incorporating public input.

Click to go to the Transportation Authority's 5YPP page. Back to the Prop K Home Page.