In which U.S. city is the MARTA rapid rail system centered?

In which U.S. city is the MARTA rapid rail system centered? Atlanta.

MARTA stands for the Metropolitan Atlanta Rapid Transit Authority, the principal public-transit operator for Atlanta and several surrounding communities in Georgia. Its rapid-transit network is centered on downtown Atlanta, where the rail lines meet at Five Points station.

MARTA was created in 1965, and bus operations began in 1972 after the authority acquired Atlanta Transit Company. Rail service followed on June 30, 1979. The system now combines heavy-rail rapid transit with buses, a streetcar, paratransit, and other services.

A common mix-up is treating MARTA as an agency serving only Atlanta city limits. Its rail system also reaches suburbs in Fulton, DeKalb, and Clayton counties, as well as Hartsfield–Jackson Atlanta International Airport. The name identifies the wider metropolitan authority, but Atlanta is the canonical city answer.