1. A vision system for a vehicle, said vision system comprising: a forward facing camera disposed at a windshield of a vehicle equipped with said vision system, said forward facing camera having a forward field of view through the windshield of the equipped vehicle; said forward facing camera comprising a CMOS imaging array sensor and a lens; wherein said forward facing camera is operable to capture image data for at least three driver assistance systems of the equipped vehicle; an image processor operable to process captured image data; wherein, responsive to processing by said image processor of captured image data, a lane of a road along which the equipped vehicle is traveling is determined; wherein, responsive to processing by said image processor of captured image data, an oncoming vehicle approaching the equipped vehicle is detected; wherein, responsive to processing by said image processor of captured image data, said vision system determines whether a detected oncoming vehicle is in a lane to the right of the determined lane along which the equipped vehicle is traveling or is in a lane to the left of the determined lane along which the equipped vehicle is traveling; wherein said at least three driver assistance systems of the equipped vehicle comprises a lane departure warning system of the equipped vehicle; and wherein said at least three driver assistance systems comprises two other driver assistance systems selected from the group consisting of (i) an intelligent headlamp control system of the equipped vehicle, (ii) a traffic sign recognition system of the equipped vehicle, (iii) an adaptive cruise control system of the equipped vehicle and (iv) an adaptive front lighting system of the equipped vehicle.