CTA Surface System History presented by the Illinois Railway Museum
Route Number 509
509 - Second Avenue - 04/02/1979
509 - Lockport - 02/23/1982
509 - Lockport - 02/10/1986
509 - Southeast Joliet - 11/20/2000
509 - Joliet-Fairmont - 03/02/2020
509 - Joliet-Fairmont - 12/06/2021
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