DRIVING ASSISTANCE CONTROL DEVICE AND DRIVING ASSISTANCE CONTROL METHOD

In a driving assistance control device, a surrounding vehicle recognition unit recognizes a position of a surrounding vehicle existing around a subject vehicle. A surrounding vehicle control information acquisition unit acquires surrounding vehicle control information including information as to whether or not the surrounding vehicle is performing traveling control using a high-definition map. A surrounding vehicle reliability determination unit determines traveling reliability of the surrounding vehicle. A driving assistance plan creation unit creates a driving assistance plan in which the subject vehicle is controlled to travel along the surrounding vehicle with the high traveling reliability as much as possible, or a driving assistance plan in which the subject vehicle is controlled not to travel along the surrounding vehicle with the low traveling reliability as much as possible on the basis of the traveling reliability of the surrounding vehicle.