1. Institute of Automotive Engineering, Graz University of Technology, 8010 Graz, Austria
2. Modelling, Simulation and Control Group, Kristl, Seibt & Co GesmbH, 8010 Graz, Austria
3. IPG Automotive GmbH, 76185 Karlsruhe, Germany
4. Vehicle Safety Institute, Graz University of Technology, 8010 Graz, Austria