Knowledge is progressing. but there is still a rea l need for research on the foundations underlying PTW insecurity, with a view to defining measures for addressing its specificities and meeting the needs of each participant in the driving system. Beyond the observation of the inherent vulnerability of this form of travel, it should be considered that PTWs have a specific dynamic behaviour that sometimes leads to greater difficulties of control in the same conditions. Their particular place in traffic should also be taken into account, with sizes and performances that can lead to special difficulties in interaction with other users of the road space.
