San Francisco Bay Area Rapid Transit District

E87163

government agency of California public agency public transit agency special-purpose district

The San Francisco Bay Area Rapid Transit District is the public agency that plans, funds, and oversees the Bay Area’s regional BART rail transit system.

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AI illustration

All labels observed (6)

Label	Occurrences
Bay Area Rapid Transit District	62
San Francisco Bay Area Rapid Transit District canonical	14
Bay Area Rapid Transit system	10
BART District	2
Bay Area Rapid Transit	1
Bay Area Rapid Transit District Board of Directors	1

How this entity was disambiguated

This entity first appeared as the object of triple T664070 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: San Francisco Bay Area Rapid Transit District
Context triple: [BART, operator, San Francisco Bay Area Rapid Transit District]

A. Santa Clara Valley Transportation Authority
The Santa Clara Valley Transportation Authority is the public transit agency that operates bus, light rail, and related transportation services throughout Santa Clara County in California’s Silicon Valley.
B. San Francisco County Transportation Authority
The San Francisco County Transportation Authority is the county’s transportation planning and funding agency, responsible for developing and overseeing major transit, roadway, and mobility projects in San Francisco.
C. San Francisco Muni
San Francisco Muni is the primary public transportation system in San Francisco, operating the city’s network of buses, light rail, historic streetcars, and cable cars.
D. AC Transit
AC Transit is a public bus agency serving the East Bay region of the San Francisco Bay Area, providing local and transbay bus services.
E. Sacramento Regional Transit
Sacramento Regional Transit is the public transportation agency serving the Sacramento, California metropolitan area with light rail and bus services.
F. None of above. chosen
G. Unsure - the case is ambiguous/there is not enough information to decide.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: San Francisco Bay Area Rapid Transit District
Target entity description: The San Francisco Bay Area Rapid Transit District is the public agency that plans, funds, and oversees the Bay Area’s regional BART rail transit system.

A. Santa Clara Valley Transportation Authority
The Santa Clara Valley Transportation Authority is the public transit agency that operates bus, light rail, and related transportation services throughout Santa Clara County in California’s Silicon Valley.
B. San Francisco County Transportation Authority
The San Francisco County Transportation Authority is the county’s transportation planning and funding agency, responsible for developing and overseeing major transit, roadway, and mobility projects in San Francisco.
C. San Francisco Muni
San Francisco Muni is the primary public transportation system in San Francisco, operating the city’s network of buses, light rail, historic streetcars, and cable cars.
D. AC Transit
AC Transit is a public bus agency serving the East Bay region of the San Francisco Bay Area, providing local and transbay bus services.
E. Sacramento Regional Transit
Sacramento Regional Transit is the public transportation agency serving the Sacramento, California metropolitan area with light rail and bus services.
F. None of above. chosen

Statements (46)

Predicate	Object
instanceOf	government agency of California ⓘ public agency ⓘ public transit agency ⓘ special-purpose district ⓘ
boardMembersElectedBy	voters in the BART District ⓘ
boardMemberTermLength	4 years ⓘ
collaboratesWith	AC Transit ⓘ linked to: Alameda-Contra Costa Transit District Caltrain ⓘ Metropolitan Transportation Commission ⓘ San Francisco Municipal Transportation Agency ⓘ
country	United States ⓘ linked to: United States of America
employs	BART employees ⓘ
fundingSource	bond measures ⓘ fares ⓘ federal funds ⓘ local taxes ⓘ state funds ⓘ
governs	Bay Area Rapid Transit system ⓘ linked to: BART
hasBoard	BART Board of Directors ⓘ linked to: BART
hasNumberOfBoardMembers	9 ⓘ
headquartersLocation	Oakland, California ⓘ linked to: Oakland
industry	public transportation ⓘ rail transport ⓘ
jurisdictionIncludes	BART rail infrastructure ⓘ BART stations ⓘ
languageOfWorkOrName	English ⓘ
legalForm	special district ⓘ
locatedIn	California ⓘ linked to: California, United States San Francisco Bay Area ⓘ
operatesOn	Pacific Time Zone ⓘ
oversees	BART rail transit system ⓘ linked to: BART Bay Area Rapid Transit ⓘ linked to: BART
purpose	funding regional rail transit ⓘ maintaining regional rail transit ⓘ operating regional rail transit ⓘ planning regional rail transit ⓘ
regulates	BART safety policies ⓘ
responsibleFor	BART system expansion planning ⓘ BART system maintenance oversight ⓘ capital projects for BART ⓘ
serviceArea	Alameda County ⓘ Contra Costa County ⓘ San Francisco County ⓘ San Mateo County ⓘ linked to: San Mateo County, California Santa Clara County ⓘ
shortName	BART District ⓘ linked to: San Francisco Bay Area Rapid Transit District

How these facts were elicited

Referenced by (90)

Full triples — surface form annotated when it differs from this entity's canonical label.

BART → operator → San Francisco Bay Area Rapid Transit District ⓘ

BART → owner → San Francisco Bay Area Rapid Transit District ⓘ

Montgomery Street station → owner → Bay Area Rapid Transit District ⓘ