Abstract: A management method including identifying a list of risks and accidents that may affect the analyzed transportation system and, for each identified risk and accident, a value of an indicator representative of the impact of the risk or accident, determining a tolerable indicator value, developing at least one measure to reduce the value of the indicator such that the value of the indicator becomes lower than the tolerable indicator value, editing a risk management table associating each identified risk and accident with the reduction measure and the value of the indicator obtained based on the reduction measure, wherein the identifying, determining and editing are done automatically, and the developing the reduction measure are carried out by a user.