Temporary suspension will affect Brown, Green, Orange and Pink Line service; shuttle buses will continue connecting customers to rail stations and Loop destinations
The Chicago Transit Authority (CTA) will complete the remaining track renewal and interlocking revitalization at the CTA’s largest junction located at Well and Lake beginning at 4 a.m. Saturday, and finishing at 4 a.m. Monday, which will require temporary changes to Brown, Green, Orange and Pink Line service in the Loop.
The Loop and Lake Junction supports all rail service on the elevated track infrastructure in the Loop. This interlocking is one of the busiest rail interlockings in the nation and requires significant maintenance every ten years to help support safe, reliable service through the Loop and reduce the risk of future service disruptions. This work is a continuation of maintenance work that began in Fall 2025 with a similar closure to revitalize two quadrants of the Loop and Lake Junction.
CTA is leveraging the ongoing closure of Pink and Green Line service due to the Chicago Department of Transportation’s (CDOT) Lake Street Bridge replacement to repair the remaining two quadrants of the Loop and Lake Junction.
Customers using the Green and Pink lines should be aware that the weekend service plan will differ from the plan in effect from October 13 – 23 due to the full Loop elevated closure over the weekend. Brown and Orange Line riders traveling into the Loop will also be impacted. Shuttle buses will transport customers around the affected area.
Shuttle buses will transport customers around the affected area.
What customers need to know
Loop and Lake junction work: 4 a.m. Saturday, October 24, till 4 a.m. Monday, October 26
- Green Line: Trains will operate between Harlem/Lake and Clinton, and separately between Roosevelt and the South Side terminals. Shuttle buses will operate between Clinton and Roosevelt, replacing the Clinton–Clark/Lake shuttle used during the first phase of the Lake Street Bridge closure. Riders traveling to/from the downtown area from the South Side branches can also connect to Red Line service at Roosevelt station.
- Brown Line: Trains will operate between Kimball and Merchandise Mart. Riders travelling downtown can connect to Red Line trains at Belmont and Fullerton stations. Shuttle buses will also be provided to connect customers between Merchandise Mart and Harold Washington Library-State/Van Buren.
- Orange Line: Trains will operate between Midway and Roosevelt. Customers traveling between Roosevelt and the Loop can use the shuttle buses operating between Roosevelt and Clinton.
- Pink Line: Trains will continue to operate between 54th/Cermak and the Racine Blue Line station. Customers traveling to or from downtown can transfer between Pink and Blue Line trains at Racine. Pink Line trains will not operate around the Loop.
CTA will use signs at affected stations, transfer points and shuttle connections, along with customer alerts and train and platform announcements, to help customers navigate the temporary changes.
Customers should plan ahead and allow additional travel time. For service information, shuttle stop locations and travel guidance, visit CTA’s customer alert for the temporary suspension of Loop ‘L’ service.
Regular service is scheduled to resume at 4 a.m. Monday, October 26, following completion of the work and required testing.
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