Abstract
Simulation may be a good tool, when one wants to get insight in the operation of a future transport system. This technique has been applied to the tramway line between Utrecht and Nieuwegein in order to get an impression of the extend of and variation in the travel times and its sensitivity to the traffic control at the intersections along the line and the location and size of the tram doors. setting up a good simulation takes years, especially due to the construction of a valid model. This problem has been avoided by connecting some existing reliable models with each other. The simulation was tried out with good results on a tram line in the Hague.