The expected total cost of accidents for France amounted between 37.5 and 50 billion Euros in 2014. It would represent between 1.5 % and 2 % of the Gross Domestic Product (GDP). At the European level, the total costs of crashes vary between 0.4% and 4.1% of the GDP and the total costs related to serious injuries vary between 0.04% of the GDP for Ireland and 2.7% for Poland, according figures advanced by a recent European research project (Safetycube). For France, the total costs of serious injury crashes/serious injuries is estimated at 10.5 billion Euros in 2014 and the total costs of slight injury crashes/slight injuries is estimated at 0,7 billion Euros. However,, the monetary values used for valuing the different types of injury are estimated by applying a simple percentage of the Statistical Value Of Life (VOSL) (3 billion Euros per fatality, 2010 value), aligned with the HEATCO or CEMT recommendations. Consequently, in France, there is no real and accurate knowledge of the amount of costs for the different components of the total costs of road injuries and there is a relative uncertainty concerning the assessment of that cost. However, that figure is quite crucial, because it could help the public decision maker in deciding to implement or not some road safety countermeasures, but also in establishing some hierarchies among the efficient road safety measures. That contribution proposes first a state of the art related to the estimation of the cost of the road injuries for the French case, the different components, and the potential sources of information and methods of estimation and second few methodological propositions in order to better identify the costs of injuries. It would sum-up the crucial information dealing with the cost of injuries, and especially the personal damage. In some way, it will propose for the first time in France a survey and a critical analysis of the most recent information available on that question. It would provide additional information collected from on-going projects.