1. Research Assistant, Institute for Transport Planning and Systems (IVT), ETH Zurich, CH-8093 Zurich, Switzerland; formerly, Rural and Surveying Engineer, KTH Royal Institute of Technology, Stockholm, Sweden.
2. Rural and Surveying Engineer, Laboratory of Transportation Engineering, School of Rural and Surveying Engineering, National Technical Univ. of Athens, Zografou 15780, Athens, Greece.
3. Assistant Professor, Laboratory of Transportation Engineering, School of Rural and Surveying Engineering, National Technical Univ. of Athens, Zografou 15780, Athens, Greece (corresponding author).