1. A driver assistance system for a vehicle, said driver assistance system comprising: an imager comprising a CMOS photosensor array of photosensor elements; wherein said imager is disposed at or proximate to an in-cabin portion of a windshield of a vehicle equipped with said driver assistance system, and wherein said imager has a forward field of view to the exterior of the equipped vehicle through the windshield of the equipped vehicle; wherein said CMOS photosensor array is operable to capture image data; a control comprising an image processor; wherein said driver assistance system identifies objects in said forward field of view of said imager via processing of captured image data by said image processor; wherein, at least in part responsive to processing of captured image data by said image processor, a determination is made that the equipped vehicle is being operated in an urban environment; and wherein, responsive to said determination that the equipped vehicle is being operated in an urban environment, operation of a driver assistance function of the equipped vehicle is inhibited.