Lawrence Tower
Lawrence Avenue and Broadway, Uptown

Service Notes:

Services:
	North Side Main Line

Quick Facts:

Established: circa 1922
Original Line: Northwestern Elevated Railroad
Rebuilt: n/a
Status: Demolished

Profile:

Lawrence Tower was installed as part of the elevation of the North Side Main Line from Lawrence to Howard, which was completed in 1922. The tower, located between Tracks 2 and 3 south of Lawrence station, controlled the convergence of the four-track main line north of Leland Avenue into just two tracks on the north approach to and from Wilson station. The tower also controlled access from Track 1 to the connector track to the Buena Interchange Yard south of Montrose Avenue. However, the switch between the connector and the gauntlet track along Track 1 was hand-throw.

On July 24, 1955, hours of attended operation of Lawrence Tower were reduced to 0630 to 1000 hours and 1430 to 1900 hours Monday through Friday only, when Evanston Express trains had to be switched to and from Tracks 1 and 4. During other times, all North-South trains used Tracks 2 and 3, allowing the switches to simply be left aligned for those tracks. However, on November 28, 1955, coverage was restored to Lawrence Tower during Monday through Friday middays.

Because the four-track main line allowed a high level of service north and south of Wilson but narrowed to just two tracks through Wilson station, Lawrence Tower (as well as Wilson Tower south of Wilson station) represented a choke point on the North Side "L" for many years. By the late 1950s, the CTA^® decided it was finally time to correct the bottleneck that the track configuration through Wilson presented. The merging of trains in each direction down to one track was not only beginning to cause intolerable delays to service but the mingling of so many trains on so few tracks was one cause cited in the investigation of a 1956 accident at Wilson.

In 1958, the CTA^® embarked on a $1.8 million project to reconstruct about 1,500 feet of right-of-way through Wilson station into a continuous four-track system. Once complete, Evanston Express and North Shore Line trains would run on the outside tracks (Tracks 1 and 4 on the southbound and northbound, respectively) and North-South Route trains would remain on Tracks 2 and 3 on the inside. Because trains would stay on their respective tracks the whole way through Wilson, Lawrence Tower would no longer be needed once the project was complete. The project took several years to complete and involved some complicated phasing to allow service to continue through the site during the project. To make the job easier, Track 1 would use part of the existing concrete elevated structure used by CTA^® freight trains connecting to the Milwaukee Road.

With the project reaching completion, Lawrence Tower was closed on January 11, 1961, concurrent with the new Track 3 being placed in service. The new Track 4 completed and placed in service on April 19, 1961. When completed, there were four tracks through Wilson served by four platforms, allowing for smoother operation without switching delays.