On the concrete viaduct the rail fastenings are fixed via plinths with anchor bolts with the fastenings placed with a 65 cm gap between each other (on average). The Pandrol Vanguard rail fastening system was specified for the sensitive areas due to its noise and vibration suppression characteristics.
The curve on the surface of the steel bridge, which is necessary for drainage purposes, and the gaps between the fastenings and the steel surface, posed a significant challenge. This was eventually solved through use of steel platforms with adjustable height, which were specifically designed for this project.
The rubber wedges integrated in the Vanguard system, which keep the rail suspended above the bridge surface, provide great flexibility, adding to the electrical isolation and help to provide vibration and sound suppression. The project was extremely successful and noise and vibration from the bridge have been kept to acceptable levels.
Due to the historic fabric of the district, certain measures were adopted during the planning and execution of the project. The historic buildings and the Genoese Walls on the Şişhane-Yenikapı railway route were dismantled on site and carried to other locations. Wherever possible, protection of the historical structures on their original sites, and construction of the railway route underneath them, were also sought under guidance from the Monument Protection Board of the Republic of Turkey.