The Bosporos Strait

Ventiflex provide fresh air into the Bosphorus Strait tunnel through the construction process.

Ventiflex Tunnel Solutions
Protan Ventiflex Air
Istanbul, Turkey
Protan Ventiflex Air
5.4 km long, 2.5 m in diameter
Avrasya Tüneli İşletme İnşaat ve Yatırım A.Ş.

5.4km long tunnel under the Bosphorus Strait linking the historic European peninsula with the motorway network on the Asian side.

120,000 cars and light vehicles are expected to travel through the tunnel each day.

The Istanbul Strait Road Crossing project is a new crossing of the Bosphorous Strait that will connect the European and Anatolian regions of Turkey, relieving congestion on the two existing Bosphorus Bridges.

The new tunnel will be constructed between Kazlicesme and Goztepe, along a 14.6-km route including a 5.4-km twin-deck tunnel that will cross the Bosphorus beneath the seabed, with the aim to alleviate İstanbul’s traffic pressure.