1. Professor and Head, Dept. of Roads and Bridges, Rzeszow Univ. of Technology, 35-959 Rzeszow, Al. Powstancow Warszawy 12, Poland (corresponding author).
2. Head of Bridge Team, Promost Consulting Sp. z o.o., 35-370 Rzeszow, Ul. Bohaterow 10 Sudeckiej Dywizji Piechoty 4, Poland.