Reverse run warning system, reverse run warning method, and reverse run warning program

摘要

PROBLEM TO BE SOLVED: To appropriately determine whether or not a vehicle is in a reverse running state so as to notify an occupant of the vehicle so as not to generate an unnecessary warning. A warning unit of a reverse running determination system issues a reverse running warning #50 to a driver of a target vehicle when a turning behavior of the target vehicle satisfies a predetermined regulation condition. The road information around the target vehicle includes at least road type information that includes the distinction between a motorway and a general road, and the warning unit enters the general road from the motorway while the target vehicle is turning. In this case, after the turning behavior is continued and the vehicle has entered the general road, the prohibition process #56 for not issuing the backward warning is executed. [Selection diagram] Fig. 6