Project Summary

The Highway Safety Improvement Program (HSIP) is a federal-aid funding program with the purpose to achieve significant reduction in traffic fatalities and serious injuries on all public roadways. Through a data-driven process to identify high crash locations, the New Hampshire Department of Transportation (NHDOT) employs these funds to perform Road safety Audits (RSA) and determine cost effective improvements to improve safety for all modes of travel. 

Hoyle Tanner was selected to aid NHDOT and local municipalities on three RSA’s located on state highways across the New Hampshire. These included projects on NH 28 in Chichester, US 202 in Jaffrey, and NH 75 in Milton. Our teams design efforts included coordinating and leading the RSA field meetings with stakeholders, identifying potential improvement measures, preparing conceptual alternatives, developing cost estimates, determining cost/benefit ratios using the Highway Safety Manual (HSM), and preparing a study document of near, intermediate, and long-term improvements. 

Through the process, our engineers and safety experts have helped to identify concerns with travel speeds, intersection sight distance, lack of auxiliary lanes, existing signage, and horizontal and vertical alignment. Working with the Department, our team has developed effective improvement alternatives to address these safety concerns and has delivered the RSA reports on-time and under budget and is excited to be help these communities take the next step towards improving their intersections.