Driving support apparatus, driving support system, and driving support method

A driving support system comprising:

• a vehicle-mounted device installed in a vehicle that is under automatic driving control;
• a mobile terminal of a user of the vehicle;
• and
• a server connected to the vehicle-mounted device and the mobile terminal, which are communicable with each other through a network, wherein:
• the mobile terminal transmits, to the server, a return request to move the vehicle to an exit location at which the user has exited the vehicle,
• upon receiving the return request, the server transmits, to the vehicle-mounted device, a return command to move the vehicle to the exit location, when a return time required to move the vehicle to the exit location is less than an available return time, the available return time being calculated based on an expected arrival time at which the vehicle is expected to arrive at a destination of a passenger different from the user, and
• upon receiving the return command, the vehicle-mounted device moves the vehicle by automatic driving control to the exit location.