Measure AA
Review of the Expenditure Plan
The Transportation Sales Tax Expenditure Plan guides how funds from Measure AA – Marin’s ½-cent transportation sales tax – are spent. Every six years, TAM is required to review the Expenditure Plan to ensure it continues to reflect the County’s diverse transportation needs.
On March 26, the TAM Board approved amendments to the Measure AA Expenditure Plan following a comprehensive review process and extensive input from our partner agencies and the community. The amendments will now be considered by the jurisdiction of Marin for adoption and implementation. Adoption requires approval by the Marin County Board of Supervisors and by a majority of jurisdictions representing a majority of the incorporated population.
Key Materials from the Measure AA 6-Year Review
March 26, 2026 TAM Board Agenda Item – Adoption of Measure AA Expenditure Plan Proposed Amendments
All Materials from March 26 Board Meeting including Supplemental Materials and Public Comments
Measure AA Expenditure Plan Amendment #1
Measure AA Review Factsheet – March 2026
Other Background Materials
January 22, 2026 TAM Board Agenda Item – including the staff memo, presentation, Expenditure Plan amendments, and a Measure AA Expenditure Plan Review Commissioner Handbook
Measure AA Expenditure Plan Review Recommendations Factsheet – January 2026
About Measure AA
Measure AA was approved by 76.7% of Marin voters on November 6, 2018, following unanimous approval by the 11 Cities and Towns and the County of Marin.
Funds generated by the sales tax can only be applied to transportation improvements that will benefit Marin County. Currently, the sales tax generates about $35 million annually to support road repairs, Safe Routes to Schools, transit service, and other vital transportation projects.
Read the 2018 Transportation Sales Tax Renewal Expenditure Plan
The Measure A/AA – Transportation Sales Tax Strategic Plan, adopted in July 2023, is a comprehensive document guiding the allocation of sales tax revenue over 30 years. With comprehensive policies and procedures corresponding to principles outlined in the Expenditure Plan approved by voters, this guiding document provides the necessary assurance to project and program sponsors, as well as the banking community, that TAM is managing its sales tax funds well. For additional background regarding the 2023 Strategic Plan, view the July 27, 2023 TAM Board meeting Staff Memo.
See the following documents for more background and information on the Measure A renewal effort.
2023 Strategic Plan and the July 27, 2023 Board Meeting Staff Memo
Final Transportation Sales Tax Renewal Expenditure Plan
2018 Expenditure Plan Fact Sheet
TAM Update and Sales Tax Renewal Presentation
Measure A Funding by Category – 2004 to present
Measure A Benefits each City, Town and the County of Marin
Sample Presentation to jurisdictions asking for Approval of the Expenditure Plan – June 2018
Draft Final Transportation Sales Tax Renewal Expenditure Plan – April 2018
Draft EPAC Proposal Factsheets – Updated 3/1/18
EPAC Member List – August 2017
Sales Tax Renewal Process – Likely Next Steps
Example Request Letter for Presentations to Local Municipalities
