The Eurasia Tunnel Project connects the Asian and European continents via a highway tunnel crossing beneath the seafloor.

Avrasya Tüneli is the world's first two-storey road tunnel.

The Eurasia Tunnel Project (Istanbul Strait Road Tube Crossing Project) connects the Asian and European sides of the city via a highway tunnel crossing underneath the seafloor. The Eurasia Tunnel, between traffic-dense Kazlıçeşme and Göztepe, covers a route of 14.6 kilometers.

While the 5.4-kilometer section of the Project consists of a twin-deck tunnel under the seafloor built with special technology and connection tunnels, a total of 9.2-kilometer routes on both the Asian and European sides includes road expansion and improvement works. The approach roads between Sarayburnu-Kazlıçeşme and Harem-Göztepe were expanded and intersections, vehicle underpasses and pedestrian overpasses were constructed.

The tunnel crossing and highway improvement-expansion work eases vehicle traffic in a holistic manner. It enables drivers to experience the freedom of a safe and comfortable journey while the duration of travel time on a heavily trafficked route is considerably shortened. In addition, environmental and noise pollution are reduced.

Republic of Turkey Ministry of Transport and Infrastructure, General Directorate of Infrastructure Investments commissioned Eurasia Tunnel Operation Construction and Investment Inc. (ATAŞ) to carry out the design, construction and operation of the Eurasia Tunnel Project. After the completion of the operation period, the Eurasia Tunnel will be transferred to the public.

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