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Commuter Rail

CTA to Extend Testing of Prototype Rail Cars on Green Line

CHICAGO — The CTA announced that the 5000-series prototype rail cars most recently being tested on the Green Line have been temporarily removed from service so that engineers can install and test a modification to the braking system. The 10 prototype rail cars were tested out-of-service since last fall and began in-service testing April 19th on the Red Line and moved to the Green Line on May 17.