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9, the original lines were known as the East-West Line, and the North-South Line. Later, a new North Line branch, not part of the original system plan, was built, and the original North Line was more accurately re-named the Northeast Line. Of the branch lines that were planned, only one was built: the Bankhead spur. The lines have evolved into color coded routes as follows: --- East-West Blue: H. E. Holmes-Indian Creek Green: Bankhead-Candler Park --- North-South Gold: Airport-Doraville Red: Airport-North Springs Three types of equipment handle service as follows: --- Model CQ310, original fleet Built 1979-1981 by Societe Franco-Belge Rebuilt 2002-2006 by Alstom #101-200 #501-520 (former single cars made into married pairs by deactivating the cabs on the "B" ends, and joining them with jumper cables prior to rebuild; not sure of their current status post-rebuild) --- Model CQ311 Built 1984-1987 by Hitachi Rebuilt 2002-2006 by Alstom #201-320 --- Model CQ312 Built 2001-2005 by Breda #601-702 (no #665-666 pair)