NAVIGATION SYSTEM AND ON-BOARD UNIT

摘要

A navigation system is provided with: a traffic condition calculation unit (222) for calculating evaluation values indicating the traffic conditions of each road segment included in a target area; a guidance route determination unit (223) for using the traffic condition evaluation values calculated by the traffic condition calculation unit and the destinations of each vehicle to select, as guidance routes, routes to the destinations having the highest degree of non-congestion based on the traffic condition evaluation values for the road segments included in the routes; and a guidance route presentation unit (224) for presenting the guidance routes determined by the guidance route determination unit to the drivers of the corresponding vehicles.