Abstract
The presents a new method for ascertaining the gradient of a road segment, based on measurements taken with GPS devices. The studied road was traveled with an instrumented vehicle, equipped with different GPS receivers, and then the data were processed using a custom software application. The reference for analysis was the existing project for rehabilitation of that road segment. Using the track measured is possible to generate the 3D road profile. The issue comes for all the experts in accident reconstructions, to have a more precise view on minimum equipment necessary to measure the road and to know from the beginning the estimation of error in simulation and reconstruction of the scene. This will be a helpful image on the estimation of total error induced in obtaining the final position.
Keywords: accident reconstruction, road geometry, slope, GPS data acquisition