Accurate vehicle length measurement and classification is essential for road safety and traffic management policy implementation. This is especially true where heavy vehicles are concerned, as restrictions on their movement may be limited only to certain lengths or classes. Sensys Gatso Australia and iMOVE has sponsored a University of Melbourne PhD project to research and develop a non-invasive axle-based vehicle classification system using tracking radar technology. The system can be used to detect, classify and measure the speed and/or length of vehicles, for both ITS and traffic enforcement applications.