Vehicle guidance method and vehicle guidance device

A vehicle guidance device in a parking lot, the vehicle guidance device comprising:

• a controller that determines, outside a vehicle, a travel route from a starting position to a target position in the parking lot, and transmits information on at least a section in the travel route to the vehicle through a communication network;
• and
• a monitor that monitors the vehicle for a deviation from the travel route during autonomous travel of the vehicle in the section, the vehicle being monitored using a monitoring system outside the vehicle,
• wherein when the deviation is detected by the monitor, the controller determines a correction route for correcting the deviation, and transmits the correction route to the vehicle through the communication network,
• when the controller determines that the vehicle cannot travel along the correction route, the controller determines an evacuation route with a current position of the vehicle set to the starting position and a predetermined location set to a second target position, and transmits the evacuation route to the vehicle through the communication network to cause the vehicle to travel along the evacuation route, and
• the evacuation route includes the second target position being different than the target position of the travel route.