VEHICLE CONTROLLER, AND METHOD AND COMPUTER PROGRAM FOR CONTROLLING VEHICLE

A vehicle controller includes a detection unit (31) that detects the type of lane line demarcating a travel lane being traveled by a vehicle (10) from a sensor signal generated by a sensor (3) mounted on the vehicle (10), the sensor signal representing surroundings of the vehicle (10); and a control unit (33) that determines whether the detected type of lane line matches the type of lane line represented in map information between the travel lane and an adjacent lane adjacent thereto at the current position of the vehicle (10) when a lane change to the adjacent lane is required. The control unit (33) controls the vehicle (10) to start a lane change to the adjacent lane in the case that the detected type of lane line matches the type of lane line represented in the map information.