| 摘要 |
A vehicle navigation system is described, comprising an onboard navigation unit installed on board a vehicle that can be used by a user to set target destinations and an operations centre communicating with the onboard navigation unit and comprising means for monitoring traffic conditions and road conditions of at least one road network, in which the onboard navigation unit is configured to receive a target destination request from the user, calculate a static road route based on information regarding the position of said vehicle and geographic data stored within it in response to said request, and provide the user with information regarding the static road route, characterized in that the onboard navigation unit (4) is configured to transmit the target destination and the static road route to the operations centre and that the operations centre is configured to calculate a dynamic road route based on the target destination, the static road route and information regarding the traffic conditions and road conditions of said road network and/or the static road route, compare the calculated dynamic road route with the static road route, and transmit information associated with a road route that is selected on the basis of the comparison to the onboard navigation unit (4).
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