1. A system for reminding a driver of the presence of at least one particular traffic sign, comprising: an imaging unit ( 1 ) attached to the vehicle and directed towards the road (R) ahead of the vehicle; a database ( 3 ) containing at least one pre-registered shape of traffic sign; an automatic recognition unit ( 2 ) for detecting and identifying, in successive images, traffic signs by searching image areas having a shape contained in said database, a selection between two signs identified in a same picture being performed by comparing the variation of the rectangular coordinates of a reference point of the signs in two successive pictures for evaluating the distance between the vehicle and the signs; and a sound ( 5 ) and/or visual ( 4 ) indicator of at least one identified traffic sign.