At this moment the capacity of the highways is not sufficient to transport all car drivers without delay. Especially in the rush hours there are enormous traffic jams. In case of special events such as traffic accidents car drivers can be delayed by hours. The losses in time and money are enormous, so the problem of traffic congestion has a high priority. To increase the capacity of the road network is not an option. The construction of new freeways in some areas is blocked by ecological, financial or political reasons. On the short term the only solution is to use the road network in an optimal way. Usually, there are many alternatives to travel from A to B. In case one route is blocked or delayed car drivers should be informed about alternatives routes. Nowadays, information about traffic jams is broadcasted via news on radio and TV, or via mobile phones, but normally only big congestions are reported and no alterative routes are suggested. Most current route planner devices have TMC (Traffic Message Channel) integrated but their information is updated only every 30 minutes which is not so fast. For extra payment special services provide personalized information which gets updated every few minutes. But all these services use the situation of the roads on a given moment and are unable to take the future into account. If all the cars are advised to take the same alternative route, soon also this one will get congested.
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