Abstract: A mapping block locates the own vehicle and another vehicle on a map DB. Another-vehicle intersection detecting block detects intersections located on a traveling path of another vehicle. An own-vehicle intersection detecting block detects intersections located in front of the own vehicle. A collision-intersection identifying block identifies an intersection that is identical to each other as the possible collision intersection by comparing the intersections detected. An information providing block conducts information provision based on calculations of an arriving time of another vehicle by using a distance to the possible collision intersection and a vehicle speed. Accordingly, the collision possibility with another vehicle can be accurately determined.

Abstract: A mapping block locates the own vehicle and another vehicle on a map DB. Another-vehicle intersection detecting block detects intersections located on a traveling path of another vehicle. An own-vehicle intersection detecting block detects intersections located in front of the own vehicle. A collision-intersection identifying block identifies an intersection that is identical to each other as the possible collision intersection by comparing the intersections detected. An information providing block conducts information provision based on calculations of an arriving time of another vehicle by using a distance to the possible collision intersection and a vehicle speed. Accordingly, the collision possibility with another vehicle can be accurately determined.