Assistance control system that prioritizes route candidates based on unsuitable sections thereof

An assistance control system, which includes a map database storing map information, that performs assistance control for causing a moving object to move to a destination based on the map information stored in the map database, wherein the assistance control includes at least one of steering control or acceleration and deceleration control, the assistance control system comprising:

• an electronic control unit programmed to:
• generate or update the map information based on input from a sensor mounted on the moving object,
• acquire a plurality of route candidates to the destination,
• evaluate the route candidates based on a distance of a section included in an unsuitable section of the route candidates, wherein the unsuitable section is the section where the assistance control that includes the at least one of steering control or acceleration and deceleration control based on the map information cannot be performed,
• set a priority of a route candidate, which is evaluated lower among the route candidates based on the distance of the section included in the unsuitable section, to be higher than priorities of other route candidates, and
• present a route candidate having the highest priority among the route candidates to an occupant of the moving object, or control the moving object along the route candidate having the highest priority.