1. In a computerized system mounted on a moving vehicle, the system including a camera mounted on the moving vehicle, wherein the camera captures in real time a plurality of image frames of the environment in the field of view of the camera and transfers the image frames to an image processor, a method for detecting and identifying a traffic sign, the method comprising the steps of: (a) programming the processor for performing the detecting of the traffic sign and for performing another driver assistance function; (b) first partitioning a first portion of the image frames to the image processor for the detecting of the traffic sign and second partitioning a second portion of the image frames for said other driver assistance function; and (c) upon detecting an image suspected to be of the traffic sign in at least one of said image frames of said first portion, tracking said image in at least one of said image frames of said second portion.