1. Associate Professor, Faculty of Civil Engineering, Dept. of Overland Communication Ways, Foundations and Cadastral Survey, Politehnica Univ. Timisoara, 2A-Traian Lalescu St., Office C 209, Timisoara 300223, Romania.
2. Assistant Professor, Faculty of Civil Engineering, Dept. of Overland Communication Ways, Foundations and Cadastral Survey, Politehnica Univ. Timisoara, 2A-Traian Lalescu St., Office C 206, Timisoara 300223, Romania (corresponding author).
3. Professor, Faculty of Civil Engineering, Dept. of Overland Communication Ways, Foundations and Cadastral Survey, Politehnica Univ. Timisoara, 2A-Traian Lalescu St., Office C 205, Timisoara 300223, Romania.