The new part-time shoulder use system is expected to ease congestion, reduce traffic in surrounding areas, and improve safety for drivers on the Piscataqua River Bridge.
In February of 2022, Green Mountain was awarded a $9 million contract to design and construct an intelligent transportation system (ITS) for the implementation of a part-time shoulder use (PTSU) system on the Interstate 95 Piscataqua River Bridge, which connects the states of Maine and New Hampshire.
After two years of collaborative work between teams from Green Mountain, AECOM, Liddell Brothers, and MobilityTech, the project was successfully completed, validated, and launched in July 2024. The resulting dynamic PTSU system is the first of its kind in New England.
The new system uses a combination of motor vehicle detection systems, CCTVs, and associated ITS field equipment to monitor traffic. When it detects high-volume periods, the system notifies traffic management centers in both Maine and New Hampshire, where operators can then activate its electronic overhead lane use signs to alert drivers that the shoulder is open for travel.
Read our case study to find out more about how the Green Mountain team successfully brought this project to life.
