Transportation Planning
and Design

Daniel Webster Highway and Spit Brook Road Transportation Improvements

Client: City of Nashua, New Hampshire

Daniel Webster Highway is a retail destination for southern New Hampshire, while Spit Brook Road is home to two of New Hampshire’s largest employers. These two highway corridors that are critical to the region and serve as a southern gateway to the state have been experiencing heavy traffic congestion. To address these issues, Tetra Tech Rizzo provided transportation planning, engineering, signal planning, and roadway design services. The City’s coordinated signal system was replaced with a new, state-of-the-art system, providing advanced coordination functions for 19 signalized intersections along the corridor. This involved replacement of the signal controllers, conflict monitors, and the generation of new timing patterns for peak periods.