A simulation tool for traffic signal control planning

The testing and evaluation of alternative signal control strategies is time consuming and the classic methods in delay and queue length estimation do not always give sufficient and valid information in changing traffic conditions. New ways are therefore needed. One possible method is advanced computer simulation. To be useful in signal control planning and research a simulator must be able to simulate the functions of the signal controller; and the behaviour and reactions of traffic flow to the signals. The paper summarizes the principles and experiences gained so far in the building and testing of this new kind of a simulator at The Helsinki University of Technology