The CP243 Interlocking Project includes the construction of a new four-track interlocking system in the vicinity of Norden Place, in Norwalk, CT. 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 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 includes the replacement of signal houses, new connections, and the mounting of the signal cable on the Walk Bridge. A submarine crossing in the Norwalk River just north of the bridge, and in the Saugatuck River in Westport is also included.
Noise & Vibration Mitigation
To address concerns surrounding noise and vibrations, the project maximizes daytime work to the extent possible, however, night work is required due to the limited availability of track outages during the day. A construction coordination plan is being developed that will identify ‘sensitive receptors,’ establish baseline noise and vibration levels, and implement monitoring and mitigation techniques to further minimize disturbances. As the project progresses, unforeseen (nuisance) noise will be evaluated and mitigated to the extent possible, and stakeholder feedback will be considered throughout the duration of the project. The following measures are being taken to reduce disruptions caused by this work, currently:
• Maximize daytime work
• Ongoing noise monitoring
• Low impact equipment
• Suppression of equipment noise
• Limit equipment idling time
Key Milestones & Cost
START OF CONSTRUCTION: October 2017
ANTICIPATED CONSTRUCTION DURATION: 3.5 years
ESTIMATED OVERALL PROJECT COST: $252 Million
ESTIMATED CONSTRUCTION COST: $242 Million
What Does CP243 Mean?
CP is the control point, 2 refers to the New Haven Commuter Line and 43 is in reference to the nearest mile post on the rail line, marked from Grand Central Station.