TRAVEL AMOUNT ESTIMATION APPARATUS

A travel amount estimation apparatus includes a vehicle travel amount calculation unit a sensor travel amount calculation unit an error cause determination unit and a vehicle travel amount correction unit The vehicle travel amount calculation unit acquires vehicle information related to traveling of an own-vehicle and calculates a vehicle travel amount indicating a travel amount of the own-vehicle based on the vehicle information The sensor travel amount calculation unit acquires sensor information related to a surrounding environment of the own-vehicle from an external sensor and calculates a sensor travel amount indicating a travel amount of the own-vehicle based on the sensor information. The error cause determination unit determines an error cause of the vehicle travel amount. The vehicle travel amount correction unit corrects the vehicle travel amount by using the sensor travel amount in accordance with the error cause and estimates a travel amount of the own-vehicle.