MAP RELIABILITY DETERMINATION APPARATUS AND DRIVING ASSISTANCE APPARATUS

A map reliability determination apparatus includes a microprocessor and a memory coupled to the microprocessor. The microprocessor is configured to perform: acquiring a traveling trajectory of a predetermined section on which a subject vehicle has traveled; recognizing, based on a map information around the subject vehicle, a pair of left and right lane boundary lines which defines a lane on which the subject vehicle has traveled in the predetermined section; calculating a deviation amount between the traveling trajectory acquired in the acquiring and the pair of left and right lane boundary lines recognized in the recognizing; determining a reliability of the pair of left and right lane boundary lines recognized in the recognizing based on the deviation amount calculated in the calculating; and outputting the reliability information including a determination result of the reliability in the determining.