POSITION CORRECTION METHOD FOR DRIVING-ASSIST VEHICLE AND POSITION ERROR CORRECTION DEVICE

The selection of whether to prioritize smoothness or to prioritize non-departure, depending on the scenario, is made possible, and vehicle behavior where it is possible to feel more at ease is achieved.In a device for correcting a position error of an autonomous vehicle provided with a navigation control unit (3) that corrects error during autonomous travel, the navigation control unit (3) includes, in a target route corrector 36 that corrects a target route, a road boundary information consolidation unit (361), a lateral correction amount calculation unit (362), and a lateral/sideways movement unit (363). The road boundary information consolidation unit (361) detects a lane boundary of a lane in which the host vehicle travels. The lateral correction amount calculation unit (362) compares positional relationships between a lane boundary that was detected and a target route on a map, and in situations where the target route is within a prescribed distance of the lane boundary, or in situations where the target route is on the opposite side of the lane boundary to the host vehicle, calculates a lateral correction amount for the target route. The lateral/sideways movement unit (363), upon the calculation of the lateral correction amount, moves the target route sideways in a lateral direction by the lateral correction amount to correct the target route.