Abstract: In a mobile navigation system, it is possible to judge as to whether or not either a traffic jam region or a traffic restriction region is reduced until a moving object reaches this traffic jam region, or traffic restriction region. The mobile navigation system comprises present position detecting means, map information storage means, route searching means, and traffic information receiving means.

Abstract: A traffic information display unit having a road type associated traffic information display mode control unit for altering the display mode of a traffic information representation in accordance with the type of a road associated with the traffic information. Alternatively, it may have a traffic information additional symbol adding unit for adding a traffic information additional symbol indicating the direction of a road associated with an accident/regulation information. Those make it possible to solve conventional problems in that a driver must manipulate a switch each time he wishes to distinguish the traffic information representation of an expressway from that of a local road, or that he cannot recognize lane in which the accident/regulation takes place because the traffic information representation of the accident/regulation information was a simple symbol on the road without showing the direction.