Foreign substance detection system and vehicle

A foreign substance detection system comprising:

• a first vehicle provided with (i) a detector configured to detect a foreign substance present on a road on which the vehicle travels and (ii) a transmitter configured to transmit a detection result of the detector externally of the vehicle;
• and
• a server device configured to receive the detection result transmitted by the first vehicle and determine whether or not the foreign substance actually exists on the road on which the first vehicle travels based on the detection result of the detector, wherein
• the server device evaluates validity of the detection result of the foreign substance by comparing, between a plurality of vehicles including the first vehicle, the detection result of the foreign substance by the detector and information on a position where the foreign substance has been detected, and
• the server device (1) upon receiving the detection result from the first vehicle indicating that the foreign substance exists at the position on the road, stops operation of a power supply device that is present in the road adjacent to the position where the foreign substance was detected, and (2) after evaluating the validity of the detection result and determining that the detection result is invalid, restarts the operation of the power supply device that is present in the road adjacent to the position where the foreign substance was detected.