A vision system for a vehicle includes a forward viewing camera and an image processor operable to process image data captured by the camera. Responsive at least in part to processing of captured image data, lane markers of a road along which the vehicle is traveling are detected, other vehicles are detected, and road curvature of the road along which the vehicle is traveling is determined. The vehicle includes a global positioning system and a vehicle communication system operable for wireless communication with an external control located remote from the vehicle. The current geographic location of the vehicle and data derived from captured image data are wirelessly communicated to the external control. The received current geographic location and data are processed at the external control and information that is derived, at least in part, from such processing is wirelessly communicated from the external control to the equipped vehicle.