Raise Manchester Peanut Roundabout and Adaptive Signals

The City of Manchester (NH) has invested in making their Downtown and Millyard areas safer for all modes of transportation through numerous improvements that include projects for pedestrian bridges, new roadways and connectors, paved trails, and multimodal bridges. The South Willow Street and Queen City Avenue intersection within the City features limitations to accessibility and lacked safety for bicyclists and pedestrians. Drive was tasked with creating a “Peanut Roundabout” would eliminate the need for traffic lights, improve safety, and would reduce confusion and unnecessary emissions. Drive analyzed the current intersection through data collected for all possible modes of transportation including vehicle, bicycle, pedestrian, transit, and commercial. Drive then developed a PTV Vissim model to analyze the interactions between each mode of transportation using this unconventional geometry of a peanut-shaped roundabout. The elimination of traffic signals and the installation of this unique roundabout will allow for safer, more efficient traffic flow for all modes of travel. See video be-low.

Drive was also responsible for the design of six (6) adaptive signals along Elm Street within the City. Drive was responsible for developing the signal timings and writing specifications for Centracs and Edaptive.