CP243 Interlocking Project

A new four-track interlocking system

The CP243 Interlocking Project includes installing a new four-track interlocking system on the New Haven Line (NHL). The new interlocking lessons the impacts of the two-track rail operations needed to replace the existing WALK Bridge. Civil construction on the interlocking is complete, and the new interlocking is anticipated to be commissioned for operation in late 2023. 

An interlocking is a powered switch and signal system that allows trains to move from one track to another. The interlocking is approximately 3,200 feet long, located on the New Haven Line (NHL) between East Norwalk and Westport.

The new interlocking includes six new switches and crossover tracks. The CP243 Interlocking Project includes approximately 6,200 feet of track replacement and realignment, signal and catenary modifications, including 18 catenary structure replacements, a power balancing station, and new drainage installed to the north and south of the tracks.

The CP243 Interlocking Project features upgrades the fiber optic signal system from Monroe Street, west of the Norwalk River, to a new signal hut just east of the River. This work included replacing signal houses, new connections, and mounting the signal cable on the WALK Bridge.


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CP243 Interlocking Project

At a Glance

Start of Construction:  October 2017

Construction Completion: 5.5 years

Metro-North Railroad Commissioning:  Fall 2023