1. Institute for Transport Studies, University of Leeds, Leeds, United Kingdom;
2. School of Mechanical Engineering, National Technical University of Athens, Athens, Greece;
3. Institute of Communication and Computer Systems, Athens, Greece;
4. Department of Mechanical Engineering, Technical University of Munich, Munich, Germany;
5. School of Psychology, University of Leeds, Leeds, United Kingdom;
6. Institute of Transportation Systems, German Aerospace Center, Braunschweig, Germany