LANE SHAPE RECOGNITION SYSTEM AND LANE SHAPE RECOGNITION METHOD

To provide a lane shape recognition system and a lane shape recognition method which can determine an effective range of the approximated curve corresponding to the lane shape. A lane shape recognition system and a lane shape recognition method detects relative positions of a series of marks or objects which are continuously arranged in front of an own vehicle, with respect to the own vehicle; calculates a curve which approximates the relative positions of the series of marks or objects with respect to the own vehicle; and when a plurality of curves are calculated, mutually compare shapes of plurality of curves and determines the curves corresponding to the lane shape and the effective range of the curves.