Patent ID: 6470266
Filing Date: 2002-10-22
Classification: G01C

Abstract:
A vehicular navigation system comprising:memory means for storing link information of links which connect nodes and connection information of each connection between the links, the links including normal roads and restricted-type roads, the connection information of the normal roads being complete, the connection information of the restricted-type roads being insufficient; control means for determining a travel path to a destination from the link information and the connection information; and indicator means for indicating the travel path, wherein the control means is constructed to use both the link information and the connection information of the normal roads and the restricted-type roads in determining the travel path, and wherein the indicator means is constructed to issue a notification that the road is a restricted-type road and specific guidance for of the restricted-type road when included in the travel path to a driver before the entry to the restricted-type road, after the entry to the restricted-type road, or both before and after the entry to the restricted-type road.