than . On the other hand, twin tunnels (each has approximately length) were completed in 445 calendar days with a cross section of each by classical mining method. These tunnels were excavated in Trakya Formation from four faces with a /face advance rate under a densely populated district with minimum and maximum overburden of , respectively. Both tunnels met up each other within ± tolerance. The largest converge measured at the tunnel crown was (design tolerance is ) with a maximum surface settlement. The tunnel is designed so that it has protected emergency areas every to provide shelter, also escape routes to the other tunnel level. Every there will be an emergency lane equipped with emergency telephone. The speed limit in the tunnel route . A daily average of around 120,000 cars and light vehicles is expected to pass through the tunnel after the first year. The toll is planned to be Turkish lira equivalent of $4 US plus VAT for cars and $6 US plus VAT for minibuses in each direction. The toll rate will change in accordance with US Consumer Price Index. See also Bosphorus Bridge, also called the First Bosphorus Bridge. Bosphorus Strait Fatih Sultan Mehmet Bridge, also called the Second Bosphorus Bridge, located about 5 km north of the Bosphorus Bridge. Great Istanbul Tunnel, a proposed three-level road-rail undersea tunnel. Marmaray, undersea rail tunnel, crossing the Bosphorus and connecting the Asian and European sides of Istanbul. Public transport in Istanbul Rail transport in Turkey Turkish Straits Yavuz Sultan Selim Bridge, also called the Third Bosphorus Bridge. References External links Connecting Continents. In: All Around, No. 4 / Herrenknecht AG, large-screen pics of the tunnel construction Undersea tunnels in Europe Toll tunnels in Turkey Tunnels in Istanbul 2016 in Istanbul Bosphorus crossings Undersea tunnels in Asia 2016 establishments in Turkey Tunnels completed in 2016 Zeytinburnu Kadıköy