Navigation system installed in vehicle, has traffic disruption detection device to detect traffic disruption by using data corresponding to driving state of vehicle, vehicle position and road class

摘要

The navigation system (10) has traffic disruption detection device (26) to detect traffic disruption by using data corresponding to driving state of vehicle, vehicle position and road class. A route calculating unit (25) computes a bypass route for vehicle, when traffic disruption is detected by the traffic disruption detection device. An independent claim is included for navigation method.