Tri Delta Transit
Tri Delta Transit, formally the Eastern Contra Costa Transit Authority, is a joint powers agency of the governments of Pittsburg, Antioch, Oakley, Brentwood, and Contra Costa County that provides bus service for the eastern area of Contra Costa County, California, United States.[4] Tri Delta Transit local buses connect to the BART rapid transit system at Pittsburg/Bay Point and Concord. Tri Delta Transit buses also connect with County Connection bus service, WestCAT bus service, Delta Breeze bus service and Amtrak at shared bus stops. In 2022, the system had a ridership of 1,045,300, or about 4,100 per weekday as of the fourth quarter of 2022.
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Parent | Eastern Contra Costa Transit Authority |
---|---|
Founded | 1977[1] |
Headquarters | 801 Wilbur Ave, Antioch, California, United States |
Locale | East Contra Costa County, California |
Service type | bus service, paratransit |
Routes | 21[1] |
Stops | 650[1] |
Fleet |
|
Daily ridership | 4,100 (weekdays, Q4 2022)[2] |
Annual ridership | 1,045,300 (2022)[3] |
Operator | First Transit[1] |
Website | trideltatransit.com |
Overview of fixed-route service

Tri Delta Transit operates in eastern Contra Costa County and has stops in Antioch, Oakley, Brentwood, Byron, Discovery Bay, Bay Point, Pittsburg, Martinez, and Concord. Tri Delta Transit operates local and express routes on weekdays, local routes on weekends/holidays, and shuttle service to San Francisco 49ers home games.
Major transfer points for the majority of Tri Delta Transit's routes include:
- Brentwood Park & Ride in Brentwood
- Antioch BART Station in Antioch
- Pittsburg Center BART Station in Pittsburg
- Pittsburg/Bay Point BART Station in Pittsburg
- Los Medanos College in Pittsburg
Fleet Roster
Fleet Number(s) | Build date |
Manufacturer | Model | Engine | Transmission | Notes |
---|---|---|---|---|---|---|
0992-0999 | Gillig | BRT 40' (G27D102N4) |
Cummins ISL | Allison B400R | 2009 models | |
1375–1399 | 2012 | Gillig | BRT 40' | Cummins ISL9 | Allison B400R | 2013 models |
1680–1699 | 2016 | Gillig | BRT 40' | Cummins ISL9 | Allison B400R | Replaced 2001 Gillig Phantoms |
1893–1897 | 2018 | Gillig | BRT 40' | Cummins L9 | Voith D864.6 | Delivered in June 2018 |
1898–1899 | 2018 | Proterra, Inc. | Catalyst BE40 | Battery electric bus | ||
1891–1892 | 2018 | BYD Auto | K9 | Battery electric bus |
List of fixed Tri Delta Transit bus routes
Tri Delta Transit operates 21 bus lines at different times. On weekdays, 16 bus lines operate throughout cities of Pittsburg, Antioch, Oakley, Brentwood, and far-west of Martinez, California. On weekends, only 5 bus lines operate throughout cities of Pittsburg, Antioch, Oakley, and Brentwood only. Weekend bus-lines intend to be longer to cover segments of many weekday-bus lines. Even though most of the bus lines have the same terminus, various of them have their own ways of reaching their terminus.[5]
Route | Westbound Terminal | Eastbound Terminal |
---|---|---|
200 Martinez/Pittsburg | Martinez station (Amtrak) | Pittsburg/Bay Point station (BART) |
201 Concord Route | Concord station (BART) | |
202 Brentwood Park & Ride / Los Medanos College (Loop) | Terminus: Brentwood Park & Ride
loop back via Los Medanos College Brentwood Center | |
300 Antioch BART/Brentwood | Antioch station (BART) | Brentwood Park & Ride |
379 Antioch Deer Valley | Kaiser Permanente Antioch Medical Center | |
380 Pittsburg Bay Point BART/Antioch BART | Pittsburg/Bay Point BART station | Antioch BART station |
381 Pittsburg Marina/Los Medanos College | Pittsburg Marina | Los Medanos College |
383 Antioch/Brentwood | Wilbur and Cavallo Rd (Tri Delta Transit HQ) | Blue Goose Park |
384 Brentwood Park & Ride/Antioch BART | Antioch BART station | Brentwood Park & Ride |
385 Brentwood/Antioch | ||
387 Pittsburg Bay Point BART/Antioch BART | Pittsburg/Bay Point BART station | Antioch BART station |
388 Pittsburg Bay Point BART/Antioch | Kaiser Permanente Antioch Medical Center | |
389 Pittsburg Bay Point BART/Bay Point | Terminus: Pittsburg/Bay Point BART station
loop around via Bay Point | |
390 Pittsburg/Bay Point BART/Antioch BART | Pittsburg/Bay Point BART station | Antioch BART station |
391 Pittsburg Center BART/Brentwood Park & Ride | Pittsburg Center BART | Brentwood Park & Ride |
709 Pittsburg/Bay Point BART/Antioch BART | Pittsburg/Bay Point BART station | Antioch BART station |
Route | Westbound Terminal | Eastbound Terminal |
---|---|---|
392 Pittsburg Bay Point BART/Antioch BART | Pittsburg/Bay Point BART station | Antioch BART station |
393 Antioch BART/Brentwood | Antioch BART station | Brentwood Park & Ride |
394 Pittsburg Bay Point BART/Antioch BART | Pittsburg/Bay Point BART station | Antioch BART station |
395 Antioch BART/Brentwood | Antioch BART station | Sand Creek Rd (Streets of Brentwood shopping mall) |
396 Bay Point/Antioch | Pacifica Ave and Driftwood Dr | Somersville Towne Center |
Paratransit
Paratransit is another transportation-mode that Tri Delta Transit operates. The paratransit transportation includes two programs; Individuals with ADA and Seniors (Age 65+) are eligible to ride this mode of transportation if they cannot independently ride fixed route Tri Delta bus service.[6]
References
- "Tri Delta Transit". trideltatransit.com. Retrieved 2023-02-07.
- "Transit Ridership Report Fourth Quarter 2022" (PDF). American Public Transportation Association. March 1, 2023. Retrieved March 29, 2023.
- "Transit Ridership Report Fourth Quarter 2022" (PDF). American Public Transportation Association. March 1, 2023. Retrieved March 29, 2023.
- "Tri Delta Transit". trideltatransit.com. Retrieved 2023-02-07.
- "Tri Delta Transit". trideltatransit.com. Retrieved 2023-02-07.
- "Tri Delta Transit". trideltatransit.com. Retrieved 2023-02-07.
External links
