California Department of Transportation

The Adopt-A-Highway (AAH) Program

Adopt-A-Highway Road sign. Telephone information listed as 1-866-Adopt a Highway. Volunteer or Sponsor

The Caltrans Adopt-A-Highway Program provides an avenue for individuals, organizations, or businesses to help maintain sections of roadside within California's State Highway System. Groups have the option to participate as volunteers or to hire a maintenance service provider to perform the work on their behalf.

The Adopt-A-Highway program, which began in 1989, has been one of the truly successful government-public partnerships of our time. More than 120,000 Californians have cleaned and enhanced over 15,000 shoulder-miles of roadside.

Participation can include one or more of the following activities:

  • Removing litter (work frequency varies with location).
  • Planting and establishing trees or wildflowers.
  • Removing graffiti.
  • Controlling vegetation.

Adoptions usually span a two-mile stretch of roadside and permits are issued for five-year periods. Groups in good standing may renew their permits indefinitely.

The Adopt-A-Highway Program is not a forum for advertising or public discourse. Please contact your local public works agency if you wish to adopt a county road or a city street that is not maintained by Caltrans.

Don't Trash California

  • The Caltrans - Don't Trash California Website is under construction.
    For more information about the Don't Trash California program, please contact Andy Morse at (916)654-4329, or via email at

Contact Adopt-A-Highway

Help California and your community and join the fight against litter! Anybody can help on California Coastal Cleanup Day!

→ Saturday, September 19, 2015 ←
(Adopt-A-Highway participants can clean their sections anytime in September)