A server device includes: a server communication unit configured to communicate with a vehicle, and receive fallen object avoidance information from the vehicle, the fallen object avoidance information including position information on a fallen object and information indicating whether an avoidance operation was performed by the vehicle for the fallen object; and a server control unit configured to determine, for the same fallen object that is present at the same position, whether the same fallen object should be avoided based on the fallen object avoidance information, and notify a first following vehicle that the same fallen object should be avoided when the server control unit determines that the same fallen object should be avoided, the first following vehicle being a vehicle that is traveling within a predetermined range behind the same fallen object.