Current position determining device and current position determining method for correcting estimated position based on detected lane change at road branch

摘要

Provided is a technology capable of improving the accuracy of determining a position of an own vehicle in the vicinity of a branch point, in a current position determining device. The current position determining device identifies a detection range according to states of a road on which a vehicle is traveling to detect a lane change, to thereby determine a current position of the vehicle based on information on the detected lane change.