Work on signal system to reroute Loop L trains

Work to replace the signal system on the Loop L will reroute elevated trains this weekend. Reroutes start at 4 a.m. Saturday until approximately 8 p.m. Sunday. Details:

  • Southbound Brown Line trains entering the Loop will operate clockwise around the Loop.
  • Northbound Orange Line trains entering the Loop will operate counter clockwise around the Loop.
  • Southbound Green Line trains will be rerouted to the track along Wells and Van Buren. Southbound Green Line trains will make their first stop at Washington/Wells, Quincy/Wells, LaSalle/Van Buren and Harold Washington Library, then proceed to Roosevelt where they will resume normal southbound service.

From the CTA press release:

The new signal system will help to improve the reliability of service by regulating train movement, speed and intervals at the Wabash and Van Buren junction where trains enter and exit the Loop.

With the current signal and control system, trains may experience delays while waiting for signal clearance when crossing into or out of the Loop. Signals act as traffic lights along the rail routes directing rail operators to proceed, slow down or stop. Signals also give the operator information regarding track conditions, routing and speed limits.

The new system will reduce signal clearance delays by replacing the current system, which is more than 30 years old, with new signals designed to improve service reliability by regulating train movement, speed and intervals more effectively. The newer equipment also will reduce the cost of maintenance as aging equipment requires maintenance more frequently.

The Loop Signal replacement project is expected to conclude in late 2010. The project is being conducted in phases to help minimize the impact to customers. The majority of the work has taken place on weekends and in the early morning hours.

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