Preparation of detail design drawings and as-built drawings of 16 road overpasses in the scope of the Ankara-İstanbul (Esenkent-Eskişehir section)High Speed Train Project. (14 overpasses with one span, 1 overpasses with two spans, 1 overpasses with three spans) (span length varies as 21.50, 26.50, 30.00 and 33.00 m) (prestressed beams)