Patent ID: 7398155

Claim:
A car navigation mounted in a vehicle, the system comprising: a position obtaining unit that obtains a current position of the vehicle; a map data obtaining unit that obtains map data; a display unit that displays a map surrounding the obtained current position; a first determining unit that determines an elevated road from the obtained map data; a second determining unit that determines whether the obtained current position is on the determined elevated road; and a display changing unit that displays, within the displayed map, the elevated road in a translucent state before the current position is determined to be located on the elevated road, and in a non-translucent state after the current position is determined to be located on the elevated road, wherein the second determining unit includes a pitch angle sensor that detects a pitch angle of the vehicle, wherein, in a case that the current position is located in a ramp way when an inclination of the vehicle is detected from the detected pitch angle, the second determining unit determines that the current position is located in one of an entrance and an exit of an elevated road.