This paper reports on an investigation of the accident risk factors of young drivers in Greece, who are considered to be a vulnerable road user group. Risk rates of young drivers are calculated per various driver, vehicle and road environment characteristics. The estimated risk rates allow for the identification of specific risk factors for young drivers. Results demonstrate that male drivers, inexperienced drivers and motorcyclists are more prone to accidents. Furthermore, accident risk is higher when driving at night. A number of targeted road safety measures are suggested based on the above results, as well as on a qualitative cost-benefit analysis.