{{Short description|Public transit agency in Contra Costa County, California}} {{Infobox Bus transit | name = Tri Delta Transit | logo = Tri Delta Transit logo.svg | logo_size = | image = Tri Delta Transit 1694, Gillig BRT at Pittsburg Bay Point.jpg | founded = {{Start date|1977}} | parent = Eastern Contra Costa Transit Authority | headquarters = 801 Wilbur Ave, Antioch, California, United States | locale = East Contra Costa County, California | service_type = bus service, paratransit | routes = 13 weekday, 8 weekend<ref name=about /> | stops = approximately 650<ref name="about">{{cite web|title=About Us | url = https://www.trideltatransit.com/about/|website=Tri Delta Transit}}</ref> | fleet = {{Plainlist|*62 transit bus *30 paratransit *6 med vans *8 microtransit Tri MyRide }}<ref name=about /> | ridership = {{American transit ridership|CA Antioch total daily}} ({{American transit ridership|dailydate}}){{American transit ridership|dailycitation}} | annual ridership = {{American transit ridership|CA Antioch total annual}} ({{American transit ridership|annualdate}}){{American transit ridership|annualcitation}} | operator = Transdev<ref name="about"/> | website = {{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.<ref name="about"/> 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 {{American transit ridership|annualdate}}, the system had a ridership of {{American transit ridership|CA Antioch total annual}}, or about {{American transit ridership|CA Antioch total daily}} per weekday as of {{American transit ridership|dailydateasof}}.

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.<ref name=SRTP-20-29/>{{rp|1}} The Tri Delta Transit name was selected in May 1977 by the marketing committee of the ECCTA.<ref>{{cite news |url=https://cdnc.ucr.edu/?a=d&d=CCT19770525.1.12 |title=East CC Bus Plan Named |date=May 25, 1977 |newspaper=Contra Costa Times |page=12 |access-date=13 March 2025}}</ref>

Tri Delta Transit fixed route service began on June 6, 1977, celebrated by an inaugural bus starting from Antioch City Hall (10&nbsp;a.m.), traveling to Oakley (10:30), Brentwood City Hall (11), Pittsburg, and ending in West Pittsburg (2&nbsp;p.m.). For the first week, free rides were offered.<ref>{{cite news |url=https://cdnc.ucr.edu/?a=d&d=CCT19770605.1.54 |title=Events Set To Herald Bus Lines |date=June 5, 1977 |newspaper=Contra Costa Times |page=54 |access-date=March 13, 2025}}</ref> 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,<ref name=SRTP-20-29>{{cite report |url=https://trideltatransit.com/wp-content/uploads/2024/05/ECCTA-2020-29-SRTP.pdf |title=Short Range Transit Plan 2020 – 2029 |date=August 26, 2020 |publisher=Eastern Contra Costa Transit Authority}}</ref>{{rp|1}} and ECCTA acquired its first buses; prior to that, AC Transit owned the buses it used for Tri Delta Transit.<ref name=InsideTDT>{{cite web |url=http://www.trideltatransit.com/how_are_we.htm |title=Inside Tri Delta Transit |publisher=Eastern Contra Costa Transit Authority |archive-url=https://web.archive.org/web/20010406052833/http://www.trideltatransit.com/how_are_we.htm |archive-date=April 6, 2001 |url-status=dead}}</ref> Some of the buses used in 1978 included 29-foot models, shortened from 35-foot buses at the AC Transit shops.<ref>{{cite news |url=https://cdnc.ucr.edu/?a=d&d=CCT19780824.1.13 |title=East County's Styled Buses |date=August 24, 1978 |newspaper=Contra Costa Times |page=13 |access-date=13 March 2025}}</ref>

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.<ref name=InsideTDT/> In 1986, Laidlaw Transit, Inc. (later First Transit, now Transdev) begin operating Tri Delta Transit.<ref name=InsideTDT/>

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.<ref name=SRTP-20-29/>{{rp|1}}

==Overview of fixed-route service== [[File:Tri Delta Transit bus in Pittsburg, February 2018.JPG|thumb|right|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: * Brentwood Park & Ride in Brentwood * Oakley Park & Ride in Oakley * Antioch BART station in Antioch * Pittsburg Center BART station in Pittsburg * Pittsburg/Bay Point BART station in Pittsburg * Los Medanos College in Pittsburg

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: * Antioch–Pittsburg station, via Route 371 ** Amtrak ''Gold Runner'' * Concord BART, via Route 201X (weekdays) ** County Connection * Martinez station, via Route 200X (weekdays) ** Amtrak ''California Zephyr'', ''Coast Starlight'', ''Gold Runner'', and ''Capitol Corridor'' ** County Connection ** WestCAT

===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.<ref name=LocalBus>{{cite web|title=Local Bus|url=https://trideltatransit.com/local_bus_riderInfo.aspx|website=Tri Delta Transit|access-date=19 July 2023}}</ref> 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.<ref name=SystemMap/>

{|class="wikitable sortable" style="text-align: center;" |+Tri Delta Transit bus routes<ref name=SystemMap>{{cite web |url=https://www.trideltatransit.com/local-and-express-routes/system-map/ |title=System Map |date=August 2024 |publisher=Tri Delta Transit |access-date=7 March 2025}}</ref> !Route !! Westbound Terminal !! Eastbound Terminal !! Weekend service !! class="unsortable" | Notes / Refs. |- !style="background: #e1a75e;"|200X |Martinez station (Amtrak) ||rowspan="2" |Pittsburg/Bay Point BART | {{no X}} || <ref>{{cite web |url=https://trideltatransit.com/bus_routes/200x-martinez-pittsburg/ |title=200X - Martinez / Pittsburg |publisher=Tri Delta Transit |access-date=31 August 2025}}</ref> |- !style="background: #0059a3;color:#fff;"|201X |Concord BART | {{no X}} || <ref>{{cite web |url=https://trideltatransit.com/bus_routes/201x-pittsburg-bay-point-bart-concord-bart/ |title=201X - Pittsburg-Bay Point BART / Concord BART |publisher=Tri Delta Transit |access-date=31 August 2025}}</ref> |- !style="background: #785a33;color:#fff;"|360{{efn|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.<ref>{{cite web |url=https://www.revitalizetridelta.com/_files/ugd/b59736_3cd9be7f78e241c6b7bf680afa93ea00.pdf |title=New TDT Network Route 360 |publisher=Tri Delta Transit |access-date=7 September 2025}}</ref>}} | Los Medanos College || Antioch High School | {{no X}} || <ref>{{cite web |url=https://trideltatransit.com/bus_routes/360-los-medanos-college-pittsburg-antioch-high-school/ |title=360 - Los Medanos College Pittsburg / Antioch High School |publisher=Tri Delta Transit |access-date=31 August 2025}}</ref> |- !style="background: #f3339e;color:#fff;"|361 | Antioch BART || Deer Valley & Dozier Libbey | {{no X}} || <ref>{{cite web |url=https://trideltatransit.com/bus_routes/361-antioch-bart-dear-valley-dozier-libbey/ |title=361 - Antioch BART / Deer Valley & Dozier Libbey |publisher=Tri Delta Transit |access-date=31 August 2025}}</ref> |- !style="background: #9e12c1;color:#fff;"|362 | colspan=2 | Blue Goose Park (Oakley Loop) | {{no X}} || <ref>{{cite web |url=https://trideltatransit.com/bus_routes/362-blue-goose-park-oakley-loop/ |title=362 - Blue Goose Park / Oakley Loop |publisher=Tri Delta Transit |access-date=31 August 2025}}</ref> |- !style="background: #d63a3d;color:#fff;"|370{{efn|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.<ref>{{cite web |url=https://www.revitalizetridelta.com/_files/ugd/b59736_0eee6b1f65a24409b80cbc879a1f41fe.pdf |title=New TDT Network Route 370 |publisher=Tri Delta Transit |access-date=7 September 2025}}</ref>}} | rowspan=3 | Pittsburg/Bay Point BART || rowspan=2 | Antioch BART | {{yes C}} || <ref>{{cite web |url=https://trideltatransit.com/bus_routes/370-pittsburg-bay-point-bart-antioch-bart/ |title=370 - Pittsburg-Bay Point BART / Antioch BART |publisher=Tri Delta Transit |access-date=31 August 2025}}</ref> |- !style="background: #3dade4;color:#fff;"|371{{efn|Adopts aspects of legacy routes 380 west of Railroad Ave (Pittsburg) and 388 east of Loveridge. Generally serves neighborhoods north of SR 4.<ref>{{cite web |url=https://www.revitalizetridelta.com/_files/ugd/b59736_15f2e643a91d45e0a635a99a772d28cc.pdf |title=New TDT Network Route 371 |publisher=Tri Delta Transit |access-date=7 September 2025}}</ref>}} | {{yes C}} || <ref>{{cite web |url=https://trideltatransit.com/bus_routes/371-antioch-bart-pittsburg-bay-point-bart/ |title=371 - Antioch BART / Pittsburg-Bay Point BART |publisher=Tri Delta Transit |access-date=31 August 2025}}</ref> |- !style="background: #0e8955;color:#fff;"|372{{efn|Largely replicates legacy route 387, with eastern terminus moved to Los Medanos College. Serves neighborhoods within Pittsburg.<ref>{{cite web |url=https://www.revitalizetridelta.com/_files/ugd/b59736_ad47616148eb4d8f8b0eaf7bb219206f.pdf |title=New TDT Network Route 372 |publisher=Tri Delta Transit |access-date=7 September 2025}}</ref>}} | Los Medanos College | {{yes C}} || <ref>{{cite web |url=https://trideltatransit.com/bus_routes/372-pittsburg-bay-point-bart-los-medanos-college-pittsburg/ |title=372 - Pittsburg-Bay Point BART / Los Medanos Colleg |publisher=Tri Delta Transit |access-date=31 August 2025}}</ref> |- !style="background: #ffa856;"|373 | Antioch BART || Brentwood Park & Ride | {{yes C}} || <ref>{{cite web |url=https://trideltatransit.com/bus_routes/373-antioch-bart-brentwood-park-ride/ |title=373 - Antioch BART / Brentwood Park & Ridee Pittsburg |publisher=Tri Delta Transit |access-date=31 August 2025}}</ref> |- !style="background: #a03b00;color:#fff;"|374 | Bay Point || Pittsburg-Bay Point BART | {{yes C}} || <ref>{{cite web |url=https://trideltatransit.com/bus_routes/374-pittsburg-bay-point-bart-bay-point/ |title=374 - Pittsburg-Bay Point BART / Bay Point |publisher=Tri Delta Transit |access-date=31 August 2025}}</ref> |- !style="background: #613fa6;color:#fff;"|375 | rowspan=3 | Antioch BART || Slatten Ranch Center | {{yes C}} || <ref>{{cite web |url=https://trideltatransit.com/bus_routes/375-antioch-bart-slatten-ranch-center/ |title=375 - Antioch BART / Slatten Ranch Center |publisher=Tri Delta Transit |access-date=31 August 2025}}</ref> |- !style="background: #a72051;color:#fff;"|376 | Kaiser Antioch Medical Center | {{yes C}} || <ref>{{cite web |url=https://trideltatransit.com/bus_routes/376-antioch-bart-kaiser-antioch-medical-center/ |title=376 - Antioch BART / Kaiser Antioch Medical Center |publisher=Tri Delta Transit |access-date=31 August 2025}}</ref> |- !style="background: #007ab8;color:#fff;"|377 | Walmart Supercenter | {{yes C}} || <ref>{{cite web |url=https://trideltatransit.com/bus_routes/377-antioch-bart-walmart-supercenter/ |title=377 - Antioch BART / Walmart Supercenter |publisher=Tri Delta Transit |access-date=31 August 2025}}</ref> |}

{|class="wikitable sortable" style="text-align: center;" |+Discontinued Tri Delta Transit bus routes !Route !! Westbound Terminal !! Eastbound Terminal !! Weekend service !! class="unsortable" | Notes / Refs. |- ! style="background: #86bbe5;" | 70 | colspan=2 | 3rd & Marina{{efn|Operates loop service in Pittsburg via Buchanan and Harbor}} | {{no X}} || <ref>{{cite web |url=http://www.trideltatransit.com:80/route_70.htm |title=Route 70 |publisher=Eastern Contra Costa Transit Authority |archive-url=https://web.archive.org/web/20010303120754/http://www.trideltatransit.com:80/route_70.htm |archive-date=March 3, 2001 |url-status=dead}}</ref> |- ! style="background: #e7a267;" | 200 | Martinez station (Amtrak) || Wilbur & Cavallo Rd{{efn|name=TDThq}} | {{no X}} || <ref>{{cite web |url=http://www.trideltatransit.com/route_200.htm |title=Route 200 |publisher=Eastern Contra Costa Transit Authority |archive-url=https://web.archive.org/web/20010524184515/http://www.trideltatransit.com/route_200.htm |archive-date=May 24, 2001 |url-status=dead}}</ref> |- !style="background: #c7651e;color:#fff;"|202X |colspan="2"|Brentwood Park & Ride{{efn|Operates loop service via Los Medanos College Brentwood Center}} | {{no X}} || {{efn|Replaced with Tri MyRide (dial-a-ride) service.<ref name=revitalize25>{{cite web |url=https://www.revitalizetridelta.com/ |title=Revitalize Tri Delta |publisher=Tri Delta Transit |access-date=31 August 2025}}</ref>}}<ref>{{cite web |url=https://trideltatransit.com/bus_routes/202x-brentwood-park-ride-los-medanos-college-brentwood/ |archive-url=https://web.archive.org/web/20250618175330/https://trideltatransit.com/bus_routes/202x-brentwood-park-ride-los-medanos-college-brentwood/ |archive-date=June 18, 2025 |title=202X - Brentwood Park & Ride / Los Medanos College Brentwood |publisher=Tri Delta Transit |url-status=dead}}</ref> |- !style="background: #693477;color:#fff;"|300 | Pittsburg/Bay Point BART||Brentwood Park & Ride | {{no X}} || <ref>{{cite web |url=http://www.trideltatransit.com/top.aspx?route=route_300_e&h=top_maps.jpg&p=route_view.aspx |archive-url=https://web.archive.org/web/20070525225814/http://www.trideltatransit.com/top.aspx?route=route_300_e&h=top_maps.jpg&p=route_view.aspx |archive-date=May 25, 2007 |title=300 Eastbound Express Commuter Service (from BART) - Weekday Service |publisher=Tri Delta Transit |url-status=dead}}</ref><ref>{{cite web |url=http://www.trideltatransit.com/top.aspx?route=route_300_w&h=top_maps.jpg&p=route_view.aspx |archive-url=https://web.archive.org/web/20070525230037/http://www.trideltatransit.com/top.aspx?route=route_300_w&h=top_maps.jpg&p=route_view.aspx |archive-date=May 25, 2007 |title=300 Westbound Express Commuter Service (from BART) - Weekday Service |publisher=Tri Delta Transit |url-status=dead}}</ref> |- !style="background: #a24b99;color:#fff;"|300X{{efn|Consolidated with 391 and renumbered to 373, which offers more frequent service.<ref name=revitalize25/>}} | Antioch BART||Brentwood Park & Ride | {{no X}} || {{efn|Designed for traditional commute, operating westbound in the mornings and eastbound in the afternoons}}<ref>{{cite web |url=https://trideltatransit.com/bus_routes/300x-brentwood-park-ride-antioch-bart/ |archive-url=https://web.archive.org/web/20250712031738/https://trideltatransit.com/bus_routes/300x-brentwood-park-ride-antioch-bart/ |archive-date=July 12, 2025 |title=300X - Brentwood Park & Ride / Antioch BART |publisher=Tri Delta Transit |url-status=dead}}</ref> |- !style="background: #8dccf5;"|379 |Antioch BART || Antioch Medical Center | {{no X}} || {{efn|Operates during school days for Antioch Unified School District<ref name=Wkend/>}}{{efn|Renumbered to 361.<ref name=revitalize25/>}}<ref>{{cite web |url=https://trideltatransit.com/bus_routes/379-antioch-bart-kaiser-antioch-medical-center/ |archive-url=https://web.archive.org/web/20250712032028/https://trideltatransit.com/bus_routes/379-antioch-bart-kaiser-antioch-medical-center/ |archive-date=July 12, 2025 |title=379 - Antioch BART / Kaiser Antioch Medical Center |publisher=Tri Delta Transit |url-status=dead}}</ref> |- !style="background: #088b3f;color:#fff;"|380{{efn|Replaced by new route (360).<ref name=revitalize25/>}} |Pittsburg/Bay Point BART||Antioch BART | {{yes C}} || {{efn|name=new370|Partially replaced by new route (370).<ref name=revitalize25/>}}<ref>{{cite web |url=https://trideltatransit.com/bus_routes/380-pittsburg-bay-point-bart-antioch-bart/ |archive-url=https://web.archive.org/web/20250804134550/https://trideltatransit.com/bus_routes/380-pittsburg-bay-point-bart-antioch-bart/ |archive-date=August 4, 2025 |title=380 - Pittsburg-Bay Point BART / Antioch BART |publisher=Tri Delta Transit |url-status=dead}}</ref> |- !style="background: #30a5da;color:#fff;"|381{{efn|Consolidated into new route (372).<ref name=revitalize25/>}} |Pittsburg Marina||Los Medanos College | {{yes C}} || <ref>{{cite web |url=https://trideltatransit.com/bus_routes/381-pittsburg-marina-los-medanos-college-pittsburg/ |archive-url=https://web.archive.org/web/20250804124145/https://trideltatransit.com/bus_routes/381-pittsburg-marina-los-medanos-college-pittsburg/ |archive-date=August 4, 2025 |title=381 - Pittsburg Marina / Los Medanos College Pittsburg |publisher=Tri Delta Transit |url-status=dead}}</ref> |- !style="background: #ed008c;color:#fff;"|383{{efn|Renumbered to 362.<ref name=revitalize25/>}} |Wilbur and Cavallo Rd{{efn|name=TDThq|Tri Delta Transit headquarters}}||Blue Goose Park | {{no X}} || <ref>{{cite web |url=https://www.trideltatransit.com/bus_routes/383-blue-goose-park-antioch-bart/ |archive-url=https://web.archive.org/web/20250716145903/https://www.trideltatransit.com/bus_routes/383-blue-goose-park-antioch-bart/ |archive-date=July 16, 2025 |title=383 - Blue Goose Park / Antioch BART |publisher=Tri Delta Transit |url-status=dead}}</ref> |- !style="background: #888c8f;color:#fff;"|384{{efn|Consolidated into new routes 373 and 375.<ref name=revitalize25/>}} | Antioch BART|| Brentwood Park & Ride | {{no X}} || <ref>{{cite web |url=https://trideltatransit.com/bus_routes/384-brentwood-park-ride-antioch-bart/ |archive-url=https://web.archive.org/web/20250804120244/https://trideltatransit.com/bus_routes/384-brentwood-park-ride-antioch-bart/ |archive-date=August 4, 2025 |title=384 - Brentwood Park & Ride / Antioch BART |publisher=Tri Delta Transit |url-status=dead}}</ref> |- !style="background: #00aacb;color:#fff;"|385{{efn|Replaced by new routes 373, 375, and 376.<ref name=revitalize25/>}} | Antioch BART|| Brentwood Park & Ride | {{no X}} || <ref>{{cite web |url=https://trideltatransit.com/bus_routes/385-antioch-bart-brentwood-park-ride/ |archive-url=https://web.archive.org/web/20250618172102/https://trideltatransit.com/bus_routes/385-antioch-bart-brentwood-park-ride/ |archive-date=June 18, 2025 |title=385 - Antioch BART / Brentwood Park & Ride |publisher=Tri Delta Transit |url-status=dead}}</ref> |- !style="background: #c7213f;color:#fff;"|386 | Brentwood Park & Ride || Discovery Bay Park & Ride | {{no X}} || <ref>{{cite web |url=http://www.trideltatransit.com/top.aspx?route=386_east&h=top_maps.jpg&p=route_view.aspx |archive-url=https://web.archive.org/web/20070525230452/http://www.trideltatransit.com/top.aspx?route=386_east&h=top_maps.jpg&p=route_view.aspx |archive-date=May 25, 2007 |title=386 Eastbound |publisher=Tri Delta Transit |url-status=dead}}</ref><ref>{{cite web |url=http://www.trideltatransit.com/top.aspx?route=386_west&h=top_maps.jpg&p=route_view.aspx |archive-url=https://web.archive.org/web/20070525230615/http://www.trideltatransit.com/top.aspx?route=386_west&h=top_maps.jpg&p=route_view.aspx |archive-date=May 25, 2007 |title=386 Westbound |publisher=Tri Delta Transit |url-status=dead}}</ref> |- !style="background: #e3a1c7;"|387{{efn|name=new370}}{{efn|Replaced by new route (372).<ref name=revitalize25/>}} | Pittsburg/Bay Point BART||Antioch BART | {{no X}} || <ref>{{cite web |url=https://trideltatransit.com/bus_routes/387-antioch-bart-pittsburg-bay-point-bart/ |archive-url=https://web.archive.org/web/20250618183446/https://trideltatransit.com/bus_routes/387-antioch-bart-pittsburg-bay-point-bart/ |archive-date=June 18, 2025 |title=387 - Antioch BART / Pittsburg-Bay Point BART |publisher=Tri Delta Transit |url-status=dead}}</ref> |- !style="background: #0079c4;color:#fff;"|388{{efn|name=new370}} | Pittsburg/Bay Point BART ||Antioch Medical Center | {{yes C}} || <ref>{{cite web |url=https://trideltatransit.com/bus_routes/388-pittsburg-bay-point-bart-kaiser-antioch-medical-center/ |archive-url=https://web.archive.org/web/20250804122921/https://trideltatransit.com/bus_routes/388-pittsburg-bay-point-bart-kaiser-antioch-medical-center/ |archive-date=August 4, 2025 |title=388 - Pittsburg-Bay Point BART / Kaiser Antioch Medical Center |publisher=Tri Delta Transit |url-status=dead}}</ref> |- !style="background: #bb2469;color:#fff;"|389{{efn|Replaced by new route (374).<ref name=revitalize25/>}} |colspan="2"|Pittsburg/Bay Point BART{{efn|Operates loop service around via Bay Point}} | {{yes C}} || <ref>{{cite web |url=https://www.trideltatransit.com/bus_routes/389-pittsburg-bay-point-bart-bay-point/ |archive-url=https://web.archive.org/web/20250716151625/https://www.trideltatransit.com/bus_routes/389-pittsburg-bay-point-bart-bay-point/ |archive-date=July 16, 2025 |title=389 - Pittsburg-Bay Point BART / Bay Point |publisher=Tri Delta Transit |url-status=dead}}</ref> |- !style="background: #b25414;color:#fff;"|390{{efn|name=new370}} |Pittsburg/Bay Point BART||Antioch BART | {{no X}} || {{efn|Operates during commute hours}}<ref>{{cite web |url=https://trideltatransit.com/bus_routes/390-antioch-bart-pittsburg-bay-point-bart/ |archive-url=https://web.archive.org/web/20250618172648/https://trideltatransit.com/bus_routes/390-antioch-bart-pittsburg-bay-point-bart/ |archive-date=June 18, 2025 |title=390 - Antioch BART / Pittsburg-Bay Point BART |publisher=Tri Delta Transit |url-status=dead}}</ref> |- !style="background: #f6a91f;"|391{{efn|Renumbered to 373.<ref name=revitalize25/>}} |Pittsburg Center BART||Brentwood Park & Ride | {{yes C}} || <ref>{{cite web |url=https://trideltatransit.com/bus_routes/391-brentwood-park-ride-pittsburg-center-station/ |archive-url=https://web.archive.org/web/20250712032310/https://trideltatransit.com/bus_routes/391-brentwood-park-ride-pittsburg-center-station/ |archive-date=July 12, 2025 |title=379 - Antioch BART / Kaiser Antioch Medical Center |publisher=Tri Delta Transit |url-status=dead}}</ref> |- ! style="background: #ce282c;color:#fff;" | 392 | Pittsburg/Bay Point BART || Brentwood Park & Ride | {{maybe|Yes (no weekdays)}}{{efn|name=exclusive}} || <ref>{{cite web |url=http://www.trideltatransit.com/route_392.htm |title=Route 392 |publisher=Eastern Contra Costa Transit Authority |archive-url=https://web.archive.org/web/20010531033213/http://www.trideltatransit.com/route_392.htm |archive-date=May 31, 2001 |url-status=dead}}</ref> |- ! style="background: #8fbf4f;" | 393 | Mariners Cove Dr & Pacifica Ave || Hillcrest Park & Ride | {{maybe|Yes (no weekdays)}}{{efn|name=exclusive}} || <ref>{{cite web |url=http://www.trideltatransit.com/route_393.htm |title=Route 393 |publisher=Eastern Contra Costa Transit Authority |archive-url=https://web.archive.org/web/20010601055007/http://www.trideltatransit.com/route_393.htm |archive-date=June 1, 2001 |url-status=dead}}</ref> |- ! style="background: #f9e02e;" | 394 | Pittsburg/Bay Point BART || Hillcrest Park & Ride | {{maybe|Yes (no weekdays)}}{{efn|name=exclusive}} || <ref>{{cite web |url=http://www.trideltatransit.com/top.aspx?route=394_east&h=top_maps.jpg&p=route_view.aspx |archive-url=https://web.archive.org/web/20070525230241/http://www.trideltatransit.com/top.aspx?route=394_east&h=top_maps.jpg&p=route_view.aspx |archive-date=May 25, 2007 |title=394 Eastbound |publisher=Tri Delta Transit |url-status=dead}}</ref><ref>{{cite web |url=http://www.trideltatransit.com/top.aspx?route=394_west&h=top_maps.jpg&p=route_view.aspx |archive-url=https://web.archive.org/web/20070525230008/http://www.trideltatransit.com/top.aspx?route=394_west&h=top_maps.jpg&p=route_view.aspx |archive-date=May 25, 2007 |title=394 Westbound |publisher=Tri Delta Transit |url-status=dead}}</ref> |- !style="background: #3c3191;color:#fff;"|395 |Antioch BART||The Streets of Brentwood | {{maybe|Yes (no weekdays)}}{{efn|name=exclusive|Operates exclusively on weekends and holidays, no weekday service<ref name=Wkend>{{cite web |url=https://www.trideltatransit.com/local-and-express-routes/holiday-schedule/ |title=Holiday Schedule |publisher=Tri Delta Transit |access-date=7 March 2025}}</ref>}} || <ref>{{cite web |url=https://www.trideltatransit.com/bus_routes/395-streets-of-brentwood-antioch-bart/ |archive-url=https://web.archive.org/web/20250615033950/https://www.trideltatransit.com/bus_routes/395-streets-of-brentwood-antioch-bart/ |archive-date=June 15, 2025 |title=395 - Streets of Brentwood / Antioch BART |publisher=Tri Delta Transit |url-status=dead}}</ref> |- !style="background: #8c73b4;color:#fff;"|709 |Pittsburg/Bay Point BART||Antioch BART | {{no X}} || {{efn|"Early Bird Express" operated as a westbound-only route by Tri Delta Transit before regular weekday eBART service starts at 5&nbsp;a.m.;<ref>{{cite web |url=https://www.bart.gov/schedules/early-bird-express |title=Early Bird Express |date=August 12, 2024 |publisher=Bay Area Rapid Transportation District |access-date=7 March 2025}}</ref> eliminated starting from June 10, 2024.<ref>{{cite web |url=https://www.bart.gov/sites/default/files/2024-03/EBX%20chart%20updated%20April%2028%202024.pdf |title=Early Bird Express chart |date=April 28, 2024 |publisher=Bay Area Rapid Transportation District |access-date=7 March 2025}}</ref>}} |- ! Delta Express | Hillcrest Park & Ride || Lawrence Livermore National Laboratory | {{no X}} || <ref>{{cite web |url=http://www.trideltatransit.com/delta_express.htm |title=Delta Express |publisher=Eastern Contra Costa Transit Authority |archive-url=https://web.archive.org/web/20010602042250/http://www.trideltatransit.com/delta_express.htm |archive-date=June 2, 2001 |url-status=dead}}</ref> |}

;Notes {{notelist}}

==References== {{reflist}}

==External links== {{Commons category}} *{{Official website}} *[http://www.transitunlimited.org/Tri_Delta_Transit_routes Tri Delta Transit routes and descriptions]

{{San Francisco Bay Area Public Transit|state=California}}

Category:Bus transportation in California Category:Public transportation in Contra Costa County, California Category:Public transportation in Alameda County, California Category:1977 establishments in California Category:Government agencies established in 1977