In steering control apparatus and method for an automotive vehicle, a
camera photographs a travel path in a traveling direction of a vehicle, a
lateral displacement calculating circuit calculates a lateral
displacement of the vehicle with respect to the travel path according to
an image of the travel path photographed by the camera, a differentiator
calculates a differential value of the lateral displacement, a vehicle
speed sensor that detects a vehicle speed, a relative yaw rate
calculating section calculates a relative yaw rate with respect to the
travel path of the vehicle on the basis of the lateral displacement, the
differential value of the lateral displacement, and the vehicle speed, an
actuator provides an assistance force for the steering mechanism, and an
actuator controlling section drivingly controls the actuator in a
direction toward which the relative yaw rate is cancelled on the basis of
the relative yaw rate.