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.
The CTA has also promised that service to/from 54th/Cermak would be increased 100% during weekday rush hours.

At the initial time of proposal, this plan was often referred to as the "Silver Line," as the original idea was to use gray as the line color on printed materials and give it the friendlier route name of "Silver."

On February 15, 2006, the CTA approved the separate plan.
Non-rush hour trains would be routed via the Loop, Green Line tracks and Paulina Connector.
During weekday rush hours, service would be available on this routing as well as the original route via the Dearborn Street subway every half hour.
These changes went into effect beginning June 25, 2006, with the trial period scheduled to end 180 days later on December 22, 2006.
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. The CTA has also promised that service to/from 54th/Cermak would be increased 100% during weekday rush hours.
At the initial time of proposal, this plan was often referred to as the "Silver Line," as the original idea was to use gray as the line color on printed materials and give it the friendlier route name of "Silver."
On February 15, 2006, the CTA approved the separate plan. Non-rush hour trains would be routed via the Loop, Green Line tracks and Paulina Connector. During weekday rush hours, service would be available on this routing as well as the original route via the Dearborn Street subway every half hour. These changes went into effect beginning June 25, 2006, with the trial period scheduled to end 180 days later on December 22, 2006.
Pink Line (CTA)