Signal Warrant Study

NH 3A, Hooksett

The Regional Signal Warrant Study is an engineering study of traffic conditions, pedestrian characteristics, and physical characteristics of intersection locations (many with existing flashing beacons) performed to determine whether installation of full traffic signal control is justified.

Every year, SNHPC sends letters of interest to municipalities to help identify study locations where signals may be needed based on Annual Average Daily Traffic volumes at an intersection's major and minor roads. The SNHPC requires local assistance in reviewing the list to add or delete locations per a community’s preference.

If your municipality is interested in having a Road Safety Audit, High Crash Location Study, or Regional Signal Warrant Study performed, please contact Principal Transportation Planner Carl Eppich at

Please see an example of a signal warrant study below: