VEHICLE CONTROL SYSTEM

A vehicle control system includes an imaging unit that generates a captured image obtained by capturing an image ahead in a traveling direction of the vehicle, an illuminance sensor that detects brightness around a vehicle, a detection unit that detects an object ahead in the traveling direction based on the captured image, an identification unit that identifies a relative position of the vehicle with respect to a tunnel in accordance with brightness around the vehicle when the tunnel is detected as the object, and a control decision unit that decides, in accordance with the identified relative position, at least one of a parameter of detection processing for detecting the object in the captured image and a state of a headlight of the vehicle.