Driving assist apparatus and program for the same

A driving assist apparatus for being mounted to an own vehicle to assist a driving operation of a driver of the own vehicle, the driving assist apparatus comprising:

• a traffic light information acquisition device that acquires light color change information and traffic light location information from at least one of the own vehicle and a different vehicle different than the own vehicle, wherein:
• the light color change information is information indicating that light color of a traffic light has been changed;
• and
• the traffic light location information is information indicative of location of the traffic light;
• a light color change prediction device that predicts a light color change time based on the light color change information and the traffic light location information, wherein the light color change time is a time of changing the light color of the traffic light;
• an own vehicle position acquisition device that acquires information indicative of position of the own vehicle;
• and
• an assist device that assists the driving of the own vehicle in accordance with the position of the own vehicle and the light color change time.