Tri Delta Transit

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Tri Delta Transit
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ParentEastern Contra Costa Transit Authority
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Headquarters801 Wilbur Ave, Antioch, California, United States
LocaleEast Contra Costa County, California
Service typebus service, paratransit
Routes13 weekday, 8 weekend[1]
Stopsapproximately 650[1]
FleetPage Template:Plainlist/styles.css has no content.
[1]
Daily ridershipTemplate:American transit ridership (Template:American transit ridership)Template:American transit ridership
Annual ridershipTemplate:American transit ridership (Template:American transit ridership)Template:American transit ridership
OperatorTransdev[1]
WebsiteTemplate:Official url

Tri Delta Transit, formally the Eastern Contra Costa Transit Authority, is a joint powers agency (JPA) 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.[1] Contra Costa County has four major public bus transportation services, divided geographically: three mostly serve destinations within the county, covering western (WestCAT), central (County Connection), and eastern (Tri Delta Transit) regions, and one (AC Transit) serves Bayside cities along the western edges of Contra Costa and Alameda counties. In Template:American transit ridership, the system had a ridership of Template:American transit ridership, or about Template:American transit ridership per weekday as of Template:American transit ridership.

Tri Delta Transit local buses connect to the BART rapid transit system at Antioch, Pittsburg Center, Pittsburg/Bay Point and Concord. In addition, Tri Delta Transit buses connect with Amtrak commuter rail services, including Gold Runner and Capitol Corridor. Within the county, several Tri Delta Transit bus routes connect with County Connection and WestCAT.

History

The Eastern Contra Costa Transit Authority (ECCTA) JPA was formed in 1976 by the cities of Antioch, Brentwood, and Pittsburg, along with the County of Contra Costa. When Oakley was incorporated in 1999, the JPA was amended to admit Oakley on April 1, 2001.[2]Template:Rp The Tri Delta Transit name was selected in May 1977 by the marketing committee of the ECCTA.[3]

Tri Delta Transit fixed route service began on June 6, 1977, celebrated by an inaugural bus starting from Antioch City Hall (10 a.m.), traveling to Oakley (10:30), Brentwood City Hall (11), Pittsburg, and ending in West Pittsburg (2 p.m.). For the first week, free rides were offered.[4] Initial service was provided for two local routes in Antioch and Pittsburg, which connected with express bus service serving BART.

AC Transit operated the service under contract until 1984, when it was transferred to a private operator,[2]Template:Rp and ECCTA acquired its first buses; prior to that, AC Transit owned the buses it used for Tri Delta Transit.[5] Some of the buses used in 1978 included 29-foot models, shortened from 35-foot buses at the AC Transit shops.[6]

Dial-a-ride on-demand transit services have been provided since 1979 using contracted private operators. ECCTA consolidated fixed route and on-demand services with a single operator when the contract with AC Transit was discontinued in 1984.[5] In 1986, Laidlaw Transit, Inc. (later First Transit, now Transdev) begin operating Tri Delta Transit.[5]

The ECCTA headquarters in Antioch was built in 1987, consolidating administration, operations, and maintenance at a single facility; expansions in 2004 provided additional space and bus parking.[2]Template:Rp

Overview of fixed-route service

File:Tri Delta Transit bus in Pittsburg, February 2018.JPG
Tri Delta Transit Gillig BRT in Pittsburg.

Tri Delta Transit operates in eastern Contra Costa County and has stops in Antioch, Oakley, Brentwood, Bay Point, Pittsburg, Martinez, and Concord. Tri Delta Transit operates local and express routes on weekdays and local routes on weekends and holidays.

Transfers

Intra-system transfer points for the majority of Tri Delta Transit's routes include:

In addition to transfers within Tri Delta Transit and to BART, riders may transfer to neighboring and long-distance public transportation systems at other stations, including:

Route list

Tri Delta Transit operates thirteen bus routes on weekdays, serving the cities of Bay Point, Pittsburg, Antioch, Oakley, and Brentwood, with one route each connecting to Concord (201X) and Martinez (200X). Most routes parallel the San Joaquin River, running east and west; routes designated as "express" (200X, 201X) are designed with fewer stops and operate primarily during commute hours with limited mid-day service. Several routes share the same terminal points, but take different paths to provide service to communities both north and south of California State Route 4.[7] For example, 370 and 371 both provide service between the Pittsburg/Bay Point and Antioch BART stations.

On the weekends and holidays, Tri Delta Transit operates eight of the thirteen routes throughout the ECCTA service area including the aforementioned cities with the exceptions of Concord and Martinez. Routes numbered 37x operate all week long, with reduced service frequencies on weekends and holidays.[8]

Tri Delta Transit bus routes[8]
Route Westbound Terminal Eastbound Terminal Weekend service Notes / Refs.
200X Martinez station (Amtrak) Pittsburg/Bay Point BART Template:No X [9]
201X Concord BART Template:No X [10]
360[a] Los Medanos College Antioch High School Template:No X [12]
361 Antioch BART Deer Valley & Dozier Libbey Template:No X [13]
362 Blue Goose Park (Oakley Loop) Template:No X [14]
370[b] Pittsburg/Bay Point BART Antioch BART Template:Yes C [16]
371[c] Template:Yes C [18]
372[d] Los Medanos College Template:Yes C [20]
373 Antioch BART Brentwood Park & Ride Template:Yes C [21]
374 Bay Point Pittsburg-Bay Point BART Template:Yes C [22]
375 Antioch BART Slatten Ranch Center Template:Yes C [23]
376 Kaiser Antioch Medical Center Template:Yes C [24]
377 Walmart Supercenter Template:Yes C [25]


Discontinued Tri Delta Transit bus routes
Route Westbound Terminal Eastbound Terminal Weekend service Notes / Refs.
70 3rd & Marina[e] Template:No X [26]
200 Martinez station (Amtrak) Wilbur & Cavallo Rd[f] Template:No X [27]
202X Brentwood Park & Ride[g] Template:No X [h][29]
300 Pittsburg/Bay Point BART Brentwood Park & Ride Template:No X [30][31]
300X[i] Antioch BART Brentwood Park & Ride Template:No X [j][32]
379 Antioch BART Antioch Medical Center Template:No X [k][l][34]
380[m] Pittsburg/Bay Point BART Antioch BART Template:Yes C [n][35]
381[o] Pittsburg Marina Los Medanos College Template:Yes C [36]
383[p] Wilbur and Cavallo Rd[f] Blue Goose Park Template:No X [37]
384[q] Antioch BART Brentwood Park & Ride Template:No X [38]
385[r] Antioch BART Brentwood Park & Ride Template:No X [39]
386 Brentwood Park & Ride Discovery Bay Park & Ride Template:No X [40][41]
387[n][s] Pittsburg/Bay Point BART Antioch BART Template:No X [42]
388[n] Pittsburg/Bay Point BART Antioch Medical Center Template:Yes C [43]
389[t] Pittsburg/Bay Point BART[u] Template:Yes C [44]
390[n] Pittsburg/Bay Point BART Antioch BART Template:No X [v][45]
391[w] Pittsburg Center BART Brentwood Park & Ride Template:Yes C [46]
392 Pittsburg/Bay Point BART Brentwood Park & Ride Yes (no weekdays)[x] [47]
393 Mariners Cove Dr & Pacifica Ave Hillcrest Park & Ride Yes (no weekdays)[x] [48]
394 Pittsburg/Bay Point BART Hillcrest Park & Ride Yes (no weekdays)[x] [49][50]
395 Antioch BART The Streets of Brentwood Yes (no weekdays)[x] [51]
709 Pittsburg/Bay Point BART Antioch BART Template:No X [y]
Delta Express Hillcrest Park & Ride Lawrence Livermore National Laboratory Template:No X [54]
Notes

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  1. ^ Subset of legacy route 380, truncated at Los Medanos College (western terminus) and Antioch High School (eastern terminus). Limited service, with one trip each in the mornings and afternoons.[11]
  2. ^ Adopts aspects of legacy routes 388 & 390 west of Railroad Ave (Pittsburg), 387 & 390 between Railroad and Loveridge, 380 & 387 between Loveridge and Somersville, 387 between Somersville and G, and 380, 388, and 387 east of G. Runs on Leland west of Somersville, then Sycamore and 18th east of Somersville.[15]
  3. ^ Adopts aspects of legacy routes 380 west of Railroad Ave (Pittsburg) and 388 east of Loveridge. Generally serves neighborhoods north of SR 4.[17]
  4. ^ Largely replicates legacy route 387, with eastern terminus moved to Los Medanos College. Serves neighborhoods within Pittsburg.[19]
  5. ^ Operates loop service in Pittsburg via Buchanan and Harbor
  6. ^ a b Tri Delta Transit headquarters
  7. ^ Operates loop service via Los Medanos College Brentwood Center
  8. ^ Replaced with Tri MyRide (dial-a-ride) service.[28]
  9. ^ Consolidated with 391 and renumbered to 373, which offers more frequent service.[28]
  10. ^ Designed for traditional commute, operating westbound in the mornings and eastbound in the afternoons
  11. ^ Operates during school days for Antioch Unified School District[33]
  12. ^ Renumbered to 361.[28]
  13. ^ Replaced by new route (360).[28]
  14. ^ a b c d Partially replaced by new route (370).[28]
  15. ^ Consolidated into new route (372).[28]
  16. ^ Renumbered to 362.[28]
  17. ^ Consolidated into new routes 373 and 375.[28]
  18. ^ Replaced by new routes 373, 375, and 376.[28]
  19. ^ Replaced by new route (372).[28]
  20. ^ Replaced by new route (374).[28]
  21. ^ Operates loop service around via Bay Point
  22. ^ Operates during commute hours
  23. ^ Renumbered to 373.[28]
  24. ^ a b c d Operates exclusively on weekends and holidays, no weekday service[33]
  25. ^ "Early Bird Express" operated as a westbound-only route by Tri Delta Transit before regular weekday eBART service starts at 5 a.m.;[52] eliminated starting from June 10, 2024.[53]

References

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  1. ^ a b c d e Page Module:Citation/CS1/styles.css has no content."About Us". Tri Delta Transit.
  2. ^ a b c Page Module:Citation/CS1/styles.css has no content.Short Range Transit Plan 2020 – 2029 (PDF) (Report). Eastern Contra Costa Transit Authority. August 26, 2020.
  3. ^ Page Module:Citation/CS1/styles.css has no content."East CC Bus Plan Named". Contra Costa Times. May 25, 1977. p. 12. Retrieved 13 March 2025.
  4. ^ Page Module:Citation/CS1/styles.css has no content."Events Set To Herald Bus Lines". Contra Costa Times. June 5, 1977. p. 54. Retrieved March 13, 2025.
  5. ^ a b c Page Module:Citation/CS1/styles.css has no content."Inside Tri Delta Transit". Eastern Contra Costa Transit Authority. Archived from the original on April 6, 2001.
  6. ^ Page Module:Citation/CS1/styles.css has no content."East County's Styled Buses". Contra Costa Times. August 24, 1978. p. 13. Retrieved 13 March 2025.
  7. ^ Page Module:Citation/CS1/styles.css has no content."Local Bus". Tri Delta Transit. Retrieved 19 July 2023.
  8. ^ a b Page Module:Citation/CS1/styles.css has no content."System Map". Tri Delta Transit. August 2024. Retrieved 7 March 2025.
  9. ^ Page Module:Citation/CS1/styles.css has no content."200X - Martinez / Pittsburg". Tri Delta Transit. Retrieved 31 August 2025.
  10. ^ Page Module:Citation/CS1/styles.css has no content."201X - Pittsburg-Bay Point BART / Concord BART". Tri Delta Transit. Retrieved 31 August 2025.
  11. ^ Page Module:Citation/CS1/styles.css has no content."New TDT Network Route 360" (PDF). Tri Delta Transit. Retrieved 7 September 2025.
  12. ^ Page Module:Citation/CS1/styles.css has no content."360 - Los Medanos College Pittsburg / Antioch High School". Tri Delta Transit. Retrieved 31 August 2025.
  13. ^ Page Module:Citation/CS1/styles.css has no content."361 - Antioch BART / Deer Valley & Dozier Libbey". Tri Delta Transit. Retrieved 31 August 2025.
  14. ^ Page Module:Citation/CS1/styles.css has no content."362 - Blue Goose Park / Oakley Loop". Tri Delta Transit. Retrieved 31 August 2025.
  15. ^ Page Module:Citation/CS1/styles.css has no content."New TDT Network Route 370" (PDF). Tri Delta Transit. Retrieved 7 September 2025.
  16. ^ Page Module:Citation/CS1/styles.css has no content."370 - Pittsburg-Bay Point BART / Antioch BART". Tri Delta Transit. Retrieved 31 August 2025.
  17. ^ Page Module:Citation/CS1/styles.css has no content."New TDT Network Route 371" (PDF). Tri Delta Transit. Retrieved 7 September 2025.
  18. ^ Page Module:Citation/CS1/styles.css has no content."371 - Antioch BART / Pittsburg-Bay Point BART". Tri Delta Transit. Retrieved 31 August 2025.
  19. ^ Page Module:Citation/CS1/styles.css has no content."New TDT Network Route 372" (PDF). Tri Delta Transit. Retrieved 7 September 2025.
  20. ^ Page Module:Citation/CS1/styles.css has no content."372 - Pittsburg-Bay Point BART / Los Medanos Colleg". Tri Delta Transit. Retrieved 31 August 2025.
  21. ^ Page Module:Citation/CS1/styles.css has no content."373 - Antioch BART / Brentwood Park & Ridee Pittsburg". Tri Delta Transit. Retrieved 31 August 2025.
  22. ^ Page Module:Citation/CS1/styles.css has no content."374 - Pittsburg-Bay Point BART / Bay Point". Tri Delta Transit. Retrieved 31 August 2025.
  23. ^ Page Module:Citation/CS1/styles.css has no content."375 - Antioch BART / Slatten Ranch Center". Tri Delta Transit. Retrieved 31 August 2025.
  24. ^ Page Module:Citation/CS1/styles.css has no content."376 - Antioch BART / Kaiser Antioch Medical Center". Tri Delta Transit. Retrieved 31 August 2025.
  25. ^ Page Module:Citation/CS1/styles.css has no content."377 - Antioch BART / Walmart Supercenter". Tri Delta Transit. Retrieved 31 August 2025.
  26. ^ Page Module:Citation/CS1/styles.css has no content."Route 70". Eastern Contra Costa Transit Authority. Archived from the original on March 3, 2001.
  27. ^ Page Module:Citation/CS1/styles.css has no content."Route 200". Eastern Contra Costa Transit Authority. Archived from the original on May 24, 2001.
  28. ^ a b c d e f g h i j k l Page Module:Citation/CS1/styles.css has no content."Revitalize Tri Delta". Tri Delta Transit. Retrieved 31 August 2025.
  29. ^ Page Module:Citation/CS1/styles.css has no content."202X - Brentwood Park & Ride / Los Medanos College Brentwood". Tri Delta Transit. Archived from the original on June 18, 2025.
  30. ^ Page Module:Citation/CS1/styles.css has no content."300 Eastbound Express Commuter Service (from BART) - Weekday Service". Tri Delta Transit. Archived from the original on May 25, 2007.
  31. ^ Page Module:Citation/CS1/styles.css has no content."300 Westbound Express Commuter Service (from BART) - Weekday Service". Tri Delta Transit. Archived from the original on May 25, 2007.
  32. ^ Page Module:Citation/CS1/styles.css has no content."300X - Brentwood Park & Ride / Antioch BART". Tri Delta Transit. Archived from the original on July 12, 2025.
  33. ^ a b Page Module:Citation/CS1/styles.css has no content."Holiday Schedule". Tri Delta Transit. Retrieved 7 March 2025.
  34. ^ Page Module:Citation/CS1/styles.css has no content."379 - Antioch BART / Kaiser Antioch Medical Center". Tri Delta Transit. Archived from the original on July 12, 2025.
  35. ^ Page Module:Citation/CS1/styles.css has no content."380 - Pittsburg-Bay Point BART / Antioch BART". Tri Delta Transit. Archived from the original on August 4, 2025.
  36. ^ Page Module:Citation/CS1/styles.css has no content."381 - Pittsburg Marina / Los Medanos College Pittsburg". Tri Delta Transit. Archived from the original on August 4, 2025.
  37. ^ Page Module:Citation/CS1/styles.css has no content."383 - Blue Goose Park / Antioch BART". Tri Delta Transit. Archived from the original on July 16, 2025.
  38. ^ Page Module:Citation/CS1/styles.css has no content."384 - Brentwood Park & Ride / Antioch BART". Tri Delta Transit. Archived from the original on August 4, 2025.
  39. ^ Page Module:Citation/CS1/styles.css has no content."385 - Antioch BART / Brentwood Park & Ride". Tri Delta Transit. Archived from the original on June 18, 2025.
  40. ^ Page Module:Citation/CS1/styles.css has no content."386 Eastbound". Tri Delta Transit. Archived from the original on May 25, 2007.
  41. ^ Page Module:Citation/CS1/styles.css has no content."386 Westbound". Tri Delta Transit. Archived from the original on May 25, 2007.
  42. ^ Page Module:Citation/CS1/styles.css has no content."387 - Antioch BART / Pittsburg-Bay Point BART". Tri Delta Transit. Archived from the original on June 18, 2025.
  43. ^ Page Module:Citation/CS1/styles.css has no content."388 - Pittsburg-Bay Point BART / Kaiser Antioch Medical Center". Tri Delta Transit. Archived from the original on August 4, 2025.
  44. ^ Page Module:Citation/CS1/styles.css has no content."389 - Pittsburg-Bay Point BART / Bay Point". Tri Delta Transit. Archived from the original on July 16, 2025.
  45. ^ Page Module:Citation/CS1/styles.css has no content."390 - Antioch BART / Pittsburg-Bay Point BART". Tri Delta Transit. Archived from the original on June 18, 2025.
  46. ^ Page Module:Citation/CS1/styles.css has no content."379 - Antioch BART / Kaiser Antioch Medical Center". Tri Delta Transit. Archived from the original on July 12, 2025.
  47. ^ Page Module:Citation/CS1/styles.css has no content."Route 392". Eastern Contra Costa Transit Authority. Archived from the original on May 31, 2001.
  48. ^ Page Module:Citation/CS1/styles.css has no content."Route 393". Eastern Contra Costa Transit Authority. Archived from the original on June 1, 2001.
  49. ^ Page Module:Citation/CS1/styles.css has no content."394 Eastbound". Tri Delta Transit. Archived from the original on May 25, 2007.
  50. ^ Page Module:Citation/CS1/styles.css has no content."394 Westbound". Tri Delta Transit. Archived from the original on May 25, 2007.
  51. ^ Page Module:Citation/CS1/styles.css has no content."395 - Streets of Brentwood / Antioch BART". Tri Delta Transit. Archived from the original on June 15, 2025.
  52. ^ Page Module:Citation/CS1/styles.css has no content."Early Bird Express". Bay Area Rapid Transportation District. August 12, 2024. Retrieved 7 March 2025.
  53. ^ Page Module:Citation/CS1/styles.css has no content."Early Bird Express chart" (PDF). Bay Area Rapid Transportation District. April 28, 2024. Retrieved 7 March 2025.
  54. ^ Page Module:Citation/CS1/styles.css has no content."Delta Express". Eastern Contra Costa Transit Authority. Archived from the original on June 2, 2001.

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