A few practical problems on the application of origin–destination estimation in motorway networks

In the recent years OD-estimation has become an accepted tool for traffic analysis and control. There are many different OD-estimation models available each of them requiring a strict traffic and network database. In real road network one has to solve many practical problems such as location of detectors, missing or incorrect traffic data, variable route choice, the variability of the OD-matrix and the computing time in large networks. In this paper some results of analysing three different OD-estimators and testing them in a motorway network are presented. Furthermore some problems which arise when carrying out estimations are discussed.