1. Head, Laboratory for Transport Engineering, Dept. of Civil and Environmental Engineering, Univ. of Cyprus, 5 Kallipoleos St., P.O. Box 20537, 1678 Nicosia, Cyprus (corresponding author).
2. Postdoctoral Research Associate, Chair of Transportation Systems Engineering, Dept. of Civil, Geo and Environmental Engineering, Technical Univ. of Munich, Arcisstrasse 21, 80333 München, Germany.
3. Professor, Chair of Transportation Systems Engineering, Dept. of Civil, Geo and Environmental Engineering, Technical Univ. of Munich, Arcisstrasse 21, D-80333 Munich, Germany.