Chicago's Railway System By tsvega Period: 1880 to 1889 cable cars replaced horse-drawn cabs Jun 6, 1892 First elevated train constructed ran from Pershing and State to Congress and Wabash 1893 train ran to Jackson Park made to serve Columbian Expedition 1894 Charles Tyson Yerkes elevated the Loop system 1943 State Street Subway (now red line) opened Nov 1, 1947 CTA took over the railway system 1951 Blue Line opened 1984 CTA extended track to O'Hare 1993 CTA extended track to Midway 2006 Pink Line opened 2017 Newest L stop Constructed the Washington-Wasbash stop