As part of the road safety audits conducted by Direction de la sécurité en transport, auditors are tasked with assessing the safety performance of the proposed plans. This road safety assessment is all the more important because in some cases the proposed plans are developed with low design speeds to allow for a tighter geometry with a view to meeting space constraints. The problem is that there are currently few references that address this issue.
The purpose of the research is to obtain information on the influence of geometry on the road safety performance of road elements, specifically interchange ramps and curves in standard sections. This information will help road safety auditors assess the performance of the proposed plans.
The work will begin with an exhaustive review of the literature on the influence of interchange design characteristics on road safety. Then, a data analysis will be performed to take stock of the sites available for analysis, obtain information on geometry, compile data on accidents and traffic volume, analyze accidents and establish various safety indicators for each site, classify sites to obtain indicators for groups of similar sites (reference groups), and establish links between the geometric characteristics of elements and their safety level. Recommendations will be issued after data analysis.