Manchester Street Intersection Improvements

Concord, New Hampshire

Client: City of Concord, New Hampshire


  • Capacity Analysis
  • Intersection Design/Analysis
  • Traffic Control Plans/Flow
  • Traffic Signal Design

Project Summary

Hoyle, Tanner is providing traffic engineering services to the City of Concord for the widening and reconstruction of Manchester Street (U.S. Route 3) in southeastern Concord. The corridor is a mile and half long two lane roadway through an urban strip environment containing a large number of automobile dealerships, businesses, restaurants, multiunit apartment complexes and miscellaneous retail outlets. The road not only services the local residents and commercial establishments but also acts as a commuter route from the southeast providing access to the airport, I-93 and the City’s downtown.

The project is a multiyear multiphase effort involving acquisition of right-of-way, moving overhead and underground trunk and service utility lines, relocating and realigning a portion of Airport Road to create a signalized intersection, preparing another intersection for future signalization, replacing the drainage system, replacing waterlines and sewer lines in some areas of the project and completely reconstructing the roadway with new box and pavement materials. The roadway is being widened to one lane in both directions with a dedicated left turn lane (three lane configuration) for part of the corridor and to two lanes in both directions with a dedicated left turn lane (five lane configuration) in the rest of the corridor. The right-of-way acquisition, utilities and basic roadway geometry are being designed for the addition of two additional lanes in the proposed three lane area in the future to create a uniform five lane layout as traffic volumes increase. The signalized intersection is designed to handle 18,000 VPD in the opening year and 25,000 VPD in twenty years.

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