The transportation system is reaching the limits of its existing capacitiy due to the increasing prosperity and economic growth, not only in The Netherlands, but worldwide. For decades traffic signal control was the most important traffic management measure, especially in urban areas. Since 25 years traffic management systems on motorways are deployed. In a wider context, traffic signal control and other traffic management systems are part of the Intelligent Transportation System (ITS)> Using ITS, the goal is to improve the transportation system by making it more effective, more efficient and safer.