The pooling of the transport infrastructures associated with the similarity of the transit conditions in difficult areas of the northern suburbs of Paris account for the relevance of understanding in order to better control the nature and the conditions of incidents emergence concerning the line “RER B”.

Statistic study of the incidents recorded in the BREHAT database about the line “RER B”.

Elaboration of an operating method of the BREHAT database. Identification and analyses of major criteria such as the type and the number of incidents, their rate, their duration.