Daily mobility and traffic risk in the Urban Community of Lille

The government has identified road safety as an issue of vital importance, and recent research programs, such as those that have been launched by the PREDIT Task Group in France or those supported by the ANR (French National Research Agency), seek to develop "new knowledge for safety". Their objective is to take into account the sociotechnical system composed of "risks associated with transportation” on a larger scale. Given this context, it is necessary to go beyond the specific analysis of black dots and run a broader geographical analysis of traffic accidents, in connection with the development of the city. The objective here is to identify a combination of factors that produce dangerous situations and, in particular, to seek the structural causes of these accidents (infrastructure, urban environments, the distribution of functional areas that control the flow, etc.). The research presented here aims specifically to analyze traffic accidents linked to the characteristics of the daily mobility of people across the Urban Community of Lille (LMCU). Household Commute Surveys (EMD) conducted within local authorities provide valuable information on the mobility of people, but the accurate mapping of mobility alongside traffic accidents is hard to achieve. The approach seeks, first and foremost, to describe and map the areas of mobility in order to highlight the areas supporting many flows, and those that send or receive those flows, in accordance with the means and reasons for travel so as to examine the resulting accidents. Secondly, modeling flows on road networks must include the characteristics of the patterns of activity/travel of the households involved. Enquiries on accidents meeting various criteria can then be carried out within the qualified networks.