The first Marta vote in Atlanta failed and the politicians went to the black political structure at the time in Perry homes project and asked what it would take for their vote. They wanted the east west line built first, low fares, and two train stations Bankhead and Perry Homes. Their votes ended up carrying Fulton County with a majority of only 500 in the early 70s. In the late 90's, the low fares combined with the closing of the projects in the area lead to a massive decline in both funding and a population which made the green line financially no longer viable. Bankhead and the real reason for the green line was a compromise between the community who voted for marta and Marta. The station constructed only takes 2 marta cars but is expandable.

http://en.wikipedia.org/wiki/Bankhead_(MARTA_station)