System Map

Welcome to Tri Delta Transit!

Serving the cities of Antioch, Pittsburg, Brentwood, Oakley and Bay Point, with limited service in Concord and Martinez, we operate 15 local bus routes Monday-Friday (including route 300X) and five on weekends & holidays. Every day we help East Contra Costa residents get to BART, work, school, the doctor, the library, parks, the movies, shopping centers, the grocery store, recreation activities, or just across town to visit family & friends.

Getting Started

Getting started is easy. To figure out which route you need, scroll through the attached system map. Routes are color coded to help you locate individual routes serving your location. Once you know which route(s) you need, click the above link called “Schedules and Maps” to see your selected route(s) including bus arrival times.

If you need assistance reading the schedule, click here to read our “How to Ride the Bus” page. Or, give us a call at 925-754-4040 and we’ll be happy to assist you.

Weekday System Map

Use the right side and bottom scroll bars to follow a route.

Weekend System Map

Use the right side and bottom scroll bars to follow a route.