 The route to the Loop follows tracks shared with Green Line trains on Lake Street, connected by the previously non-revenue Paulina Connector.In January 2006, the CTA held hearings on its proposal to reroute trains from 54th/Cermak via the recently rebuilt Paulina Connector to the Lake Street Green Line tracks, then operating around the Loop clockwise for the first time since Douglas trains began using the Milwaukee-Dearborn Subway in downtown Chicago on June 22, 1958.This would allow a doubling of Blue Line trains to Forest Park on the Congress Branch, since service would no longer be divided between the Forest Park and 54th/Cermak terminals.