Tri Delta Transit | 511 Contra Costa

Tri Delta Transit

Tri Delta Transit is a transit agency serving the cities of Antioch, Pittsburg, Brentwood, Oakley, and Bay Point, with limited service in Concord and Martinez.


  • Local fixed-route bus service
  • Tri MyRide on-demand local shuttle service

Tri MyRide

Tri MyRide is an on-demand shuttle service operated by Tri Delta Transit. It provides safe, efficient, affordable transportation to Antioch or Pittsburg/Bay Point BART stations as well as popular shopping destinations. Setting up a pick-up is easy using the Tri MyRide app.

Discounts & Special Offers

Tri Delta Transit 20-Ride Pass Offer: Buy one Commuter 20-Ride Pass, get one free

Try Transit $20 Clipper Card Offer: Pledge to try transit as an alternative to driving alone to work or campus and receive a pre-loaded $20 Clipper card