Scorecard · checked October 15, 2026
The 2007 Bay Area Regional Rail Plan. What got built?
In September 2007 the Bay Area agreed a 50-year plan for its trains: BART, Caltrain, high-speed rail, and new lines around the Bay. Nineteen years on, here is every main project, with what happened and a source for each.
- 8built
- 3partly built
- 4under construction
- 5still on paper
- 3dropped
Built and running (8)
SMART Windsor extension
Built · 2025Windsor passenger service began 2025-05-31; grand opening 2025-06-13.
Sources: sonomamarintrain.org · krcb.org
Caltrain electrification (SF–San Jose)
Built · 2024Fully electric Caltrain service launched on 2024-09-21 (new weekday schedule from 2024-09-23); diesel trains still run San Jose–Gilroy.
Sources: metro-magazine.com · trains.com · abc7news.com
BART Silicon Valley Phase I (Milpitas, Berryessa/North San José)
Built · 2020Milpitas and Berryessa/North San José opened to the public 2020-06-13; about 10 miles, about $2.3B.
Sources: abc7news.com · en.wikipedia.org
SMART Larkspur extension
Built · 2019Larkspur (ferry connection) and downtown Novato opened 2019-12-14.
Sources: en.wikipedia.org
Transbay Transit Center (Salesforce Transit Center)
Built · 2018The $2.2B bus terminal and rooftop park opened in August 2018, closed 2018-09-25 after cracked steel beams were found, and reopened 2019-07-01; its train box waits for The Portal.
Sources: abc7news.com · ktvu.com
BART Warm Springs extension
Built · 2017Warm Springs/South Fremont station opened 2017-03-25, about two years after the plan's 2015 near-term window.
Sources: en.wikipedia.org
SMART initial service (Sonoma County Airport–San Rafael)
Built · 2017Full passenger service began 2017-08-25.
Sources: kqed.org
BART Oakland Airport Connector
Built · 2014A 3.2-mile automated link from Coliseum to OAK opened 2014-11-22, replacing the AirBART bus.
Sources: alamedactc.org · en.wikipedia.org
Partly built (3)
Caltrain grade separations / 3rd-4th tracks
Partly built · 2021Some crossings removed (San Bruno 2014, 25th Avenue San Mateo 2021); Burlingame Broadway and Palo Alto crossings are still in design; no 3rd/4th-track expansion found.
Sources: caltrain.com · progressiverailroading.com · paloalto.gov
eBART / BART to Antioch
Partly built · 2018A 10-mile diesel train line from Pittsburg/Bay Point to Antioch (with Pittsburg Center) opened 2018-05-26. The plan's reach to Byron and the long-term idea of going on to Tracy were not built.
Sources: bart.gov · 511.ccta.ca.gov
Capitol Corridor improvements
Partly built · 2017Fairfield–Vacaville station opened 2017-11-13. South Bay Connect (rerouting via Coast Subdivision and Ardenwood station) was environmentally cleared in Nov 2024, construction not confirmed; Oakland–Richmond 3rd/4th tracks and Hercules station not verified.
Sources: en.wikipedia.org · southbayconnect.com · ceqanet.lci.ca.gov
Under construction (4)
BART Silicon Valley Phase II (downtown San José, Diridon, Santa Clara)
Under constructionEarly works (Newhall Yard tunnel launch structure) are under way, but the federal grant agreement is not signed: FTA capped its share at $5.1B (40%), the cost is $12.746B, the FFGA target is July 2027, and FTA's monitor recommends service from 2039-02-28 (VTA's site says 2035–2037).
Sources: vtabart.org · vtabart.org · vta.org
SMART Healdsburg extension
Under constructionFully funded ($269M in grants); field work began 2026-03-30 and the groundbreaking was 2026-05-08; SMART expects passenger service at the end of 2028.
Sources: sonomamarintrain.org · stacywitbeck.com
BART Core Capacity / Transbay Corridor Core Capacity Program
Under constructionOriginal 775-car Fleet of the Future finished July 2024. The core capacity program (306 more cars, new train control, Hayward yard, 6 substations) targets 40% more transbay capacity; MTC allocated $165.8M (SB 125) on 2026-06-24.
Sources: masstransitmag.com · mtc.legistar.com · mtc.ca.gov
ACE improvements / Valley Rail extension (Ceres, later Merced)
Under constructionValley Rail construction began 2024; Manteca/Modesto/Ceres service was targeted for late 2026 and Merced for 2030. As of 2026-10-15 it is not confirmed whether Ceres service has started.
Sources: en.wikipedia.org · trains.com · cerescourier.com
Still on paper (5)
SMART Cloverdale extension
Still on paperNot yet fully funded; SMART is still pursuing state and federal grants.
Sources: sonomamarintrain.org
The Portal / Caltrain Downtown Rail Extension (DTX)
Still on paperIn FTA engineering since May 2024 with a $3.38B federal share set, but no grant agreement. TJPA targets the FFGA for July 2027 and revenue service for May 2036, subject to funding; tunnel contract award is expected Q1 2027.
Sources: tjpa.org · smartcitiesdive.com · sfcta.org
California High-Speed Rail to San José and San Francisco
Still on paperEnvironmentally cleared (San José–Merced 2022-04-28, SF–San José 2022-08-18), but there is no Bay Area HSR construction. The 2026 Business Plan (adopted 2026-06-01) puts Merced–Bakersfield first (no earlier than 2033) and gives only a $2–5B placeholder for San José–Gilroy.
Sources: hsr.ca.gov · hsr.ca.gov · hsr.ca.gov
Link21 standard-gauge (regional rail) transbay crossing
Still on paperLink21 picked a standard-gauge tunnel in 2025, but BART says it is 'unrealistic' soon: it lost a federal grant, Phase 2 needs about $800M, and funding may take 10+ years.
Sources: mtc.legistar.com · link21program.org · capitolcorridor.org
Rail extension to Salinas (Monterey County Rail Extension)
Still on paperTAMC is targeting Caltrain service to Salinas around 2027–2028 (about $86M); it still needs Union Pacific agreements.
Sources: en.wikipedia.org · masstransitmag.com
Dropped (3)
Second BART transbay tube + SF subway
Dropped · 2025In June 2025 the BART board chose not to pursue a second BART crossing. On 2026-06-24 MTC removed the 'second transbay crossing' from RM3's $50M Project 13 and moved it to BART's Transbay Core Capacity program.
Sources: mtc.legistar.com · mtc.ca.gov · mtc.ca.gov
BART extension to Livermore
Dropped · 2018On 2018-05-24 the BART board voted 5–4 against the $1.6B extension; the Tri-Valley rail authority then took up Valley Link instead.
What replaced it: Phase 1 cost rose from about $1.9B (2022) to $4.4B, so Phase 1 was cut to Dublin/Pleasanton–Vasco Road in June 2025. FTA environmental clearance came in 2026; construction is not funded, and leaders hope for service in the early 2030s.
Sources: ktvu.com · pressreader.com · en.wikipedia.org
Dumbarton Rail (Redwood City–Union City)
DroppedNever built. SamTrans's 'Reimagine Dumbarton' study (to winter 2027) looks at zero-emission buses on the west side only, 'without a new Bay crossing'.
Sources: cal.streetsblog.org · menlopark.gov
How this was checked
The project list comes from the plan's final report (MTC, September 2007), mainly the phasing table in Chapter 8. Each status was checked on October 15, 2026 against agency pages, board minutes and news reports, linked on each card. A few dates rely on Wikipedia, cross-checked with news coverage.
Not yet checked, so left off the scorecard: BART Silicon Valley – San José airport connector; BART Oakland fourth track / lower-level platforms; West Oakland Capitol Corridor station + people mover; North Bay (Napa–Solano–SMART) passenger rail; eBART extension to Tracy.
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