Alertinfra is software used in safety study, which detects automatically dangerous areas of infrastructure. This tool was developed in French research project funded by the French Central Laboratory of Road and Bridges. The method is based on a multicriteria analysis, which aims at detecting dangerous configuration of infrastructure (i.e. combinations of geometric and surface characteristics values that may entail a risk of accident). The software makes an analysis of a road database containing six parameters ofinfrastructure (radius of curvature, crossfall, longitudinal slope, unevenness, skid resistance and macrotexture) and indicates warning messages when dangerous configurations are detected. These risky configurations are called Alerts. Each alert matches to a specific warning message, which indicates the road parameters that can represent a risk for road users. Moreover, each alert in curves is associated to an individual level of risk,than can be added to obtain a global level of risk in the curve. Thus, all the curves of an itinerary can be classified depending on the risk they represent. The choice of the alerts was done thanks to the statistical analyses of a database containing the characteristics of 774 curves (geometry, surface characteristics, accidents). The validation of the alerts was realized on a second database containing 470 other curves. The paper presents the software Alertinfra in a first step and some examples of use of thistool in safety study in a second step.
Abstract