Vehicle wrong-way travel detection device

A vehicle wrong-way travel detection device, comprising:

• a vehicle position detector that detects a position of a vehicle;
• a traveling direction detector that detects a vehicle traveling direction along which the subject vehicle is traveling;
• a storage device where map information is stored;
• a control unit that executes various types of processings;
• and
• an output unit that outputs various types of information, wherein:
• the control unit:
• creates a wrong-way travel decision-making area to be used to make a decision as to whether or not the vehicle is traveling against a traffic flow;
• makes a decision as to whether or not the vehicle is traveling against the traffic flow when the position of the vehicle detected by the vehicle position detector is within the wrong-way travel decision-making area;
• and
• deletes the created wrong-way travel decision-making area when a predetermined condition is satisfied, and
• the output unit outputs information to warn a user that the vehicle is traveling against the traffic flow when the control unit has decided that the vehicle is traveling against the traffic flow.