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1915 Çanakkale Bridge

Suspension bridge across the Dardanelles in Turkey

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The bridge was officially opened by President Recep Tayyip Erdoğan in 2022 after roughly five years of construction. It is the centrepiece of the planned 321-kilometre-long (199 mi) US$2.8 billion O-6 motorway, which will connect the O-3 and O-7 motorways in East Thrace with the O-5 motorway in Anatolia. The year "1915" in the official Turkish name honours an important Ottoman victory in the Gallipoli campaign comprising an unsuccessful Entente naval attack followed by invasions of the Gallipoli peninsula by the forces of Australia, New Zealand, France, and Great Britain, on 25 April 1915 and a second in August; the Entente land forces failed to make significant progress and were evacuated at the end of that year.

The bridge is the first fixed crossing over the Dardanelles and the sixth one across the Turkish Straits, after three bridges over the Bosphorus and two tunnels under it.

Design and cost

The bridge's tender project was designed by Turkey-based Tekfen Construction and Installation and detailed designed by Denmark-headquartered COWI A/S and by Pyunghwa Engineering Consultants (PEC) in South Korea (for cable design and approach bridge design packages only). UK-headquartered Arup Group and Norway-based Aas-Jakobsen conducted independent design verification. The Administrator consultants are Tekfen and Switzerland-based T-ingénierie.

The total length of the bridge is 3,563 metres (11,690 ft) and together with the approach viaducts the length reaches 4,608 metres (15,118 ft), which surpasses the total length of the Osman Gazi Bridge and its approach viaducts by 527 metres (1,729 ft), to become the longest bridge of any type in Turkey.

The height of the bridge's two towers is 334 metres (1,096 ft), making it the tallest bridge in Turkey, surpassing Yavuz Sultan Selim Bridge, and the third tallest structure in the country. Internationally, the bridge is the fifth tallest bridge in the world. The deck of the bridge is 72.8 metres (239 ft) high and 45.06 metres (147.8 ft) wide, with a maximum thickness of 3.5 metres (11 ft). The deck carries six lanes of motorway (three in each direction), together with a walkway on each side for maintenance.

According to President Erdoğan, the bridge cost 2.5 billion euros (2.7 billion US dollars) to build, but would save €415 million ($458 million) per year from a reduction of fuel consumption and carbon emissions.

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