The present invention is provided with: a plurality of vehicles (2) each having an occupant suitability detection device (21) that detects the suitability of an occupant (200) as a driver, a vehicle side operation device (22) that is operated by the driver, a vehicle side control device (28) that controls the traveling state of a vehicle (2), and a DCM (24); and a control center (3) having a center side communication device (31) and a center side control device (33) that controls the traveling states of the vehicles (2) via the vehicle side control devices (28), wherein each of the vehicle side control devices (28) controls the traveling state of the vehicle (2) in any one of a manual operation mode based on operation of the vehicle side operation device (22), an automatic operation mode not based on operation of the vehicle side operation device (22), and a center operation mode based on the center side control device (33), and, in the case when a transition from the automatic operation mode to the manual operation mode occurs, transitions to the center operation mode upon determining that the occupant (200) is not suitable as a driver.