1. A vehicular control system, said vehicular control system comprising: a forward viewing camera disposed at a windshield of a vehicle equipped with said vehicular control system; wherein said forward viewing camera views forward through the windshield of the equipped vehicle and is operable to capture image data; said forward viewing camera comprising an imaging array sensor and a lens; a control comprising an image processor operable to process image data captured by said forward viewing camera; wherein, responsive at least in part to processing by said image processor of image data captured by said forward viewing camera, at least one road characteristic of a road along which the equipped vehicle is traveling is detected; wherein the at least one road characteristic of the road along which the equipped vehicle is traveling comprises at least two road characteristics selected from the group consisting of (i) a curb of the road along which the equipped vehicle is traveling, (ii) a lane marker of the road along which the equipped vehicle is traveling and (iii) a road shoulder of the road along which the equipped vehicle is traveling; wherein, responsive at least in part to processing by said image processor of image data captured by said forward viewing camera, other vehicles exterior the equipped vehicle are detected; wherein, responsive at least in part to processing by said image processor of image data captured by said forward viewing camera, road curvature of the road along which the equipped vehicle is traveling is determined; wherein data is wirelessly communicated from the equipped vehicle to a remote data receiver located remote from the equipped vehicle; wherein data wirelessly communicated from the equipped vehicle to the remote data receiver comprises data that is at least in part relevant to a current geographic location of the equipped vehicle; wherein data wirelessly communicated from the equipped vehicle to the remote data receiver that is at least in part relevant to the current geographic location of the equipped vehicle is derived, at least in part, from processing by said image processor of image data captured by said forward viewing camera; wherein data wirelessly communicated from the equipped vehicle to the remote data receiver is processed at the remote data receiver to determine information relevant to the equipped vehicle; and wherein said control controls speed of the equipped vehicle responsive at least in part to processing by said image processor of image data captured by said forward viewing camera.