It operates between Hamilton E. Holmes and Indian Creek stations, running through Atlanta, Decatur and portions of unincorporated DeKalb County.

[1] On June 30, 1979, service on the East Line began operating between Avondale and Georgia State.

[4] The following year, on June 26, 1993, Kensington and Indian Creek stations on the East Line opened.

[4] In 2009, MARTA introduced a color-coded system of naming for its rail lines.

[6] On March 25, 2024, Andre Dickens, the mayor of Atlanta, announced plans for four new infill stations on the MARTA rail network.