One of the tunnels that will be located in the 'Inonu-Vezirhan-Kösekoy' section of the 533 kilometer, which is the second stage of the 158 kilometer Ankara-Istanbul high speed train project, consists of 7 bin 470 meters and the other one is the 6 bin 100. The 7 bin 470 kilometer tunnel will be built between Vezirhan and Köseköy, which is also known as Doğançay Ripajı. A direct landing will be provided to Sapanca by this tunnel. Turkey's second longest tunnel construction is ongoing at İnönü-Vezirhan cut, Bilecik established 7 kilometers.
The Republic of Turkey State Railways (TCDD), one after the other with high-speed trains to reduce the travel time between Ankara and Istanbul 3 hours tunnel and köprüyol (viaduct) is building. Particularly the second stage of the high-speed train project, Inonu-Vezirhan (54 km), Vezirhan-Kosekoy (104 km) will be made full 33 tunnel 29 bridge. The total length of the tunnels between 19 and İnönü-Vezirhan is 29 bin 146 meters. 16 thousand 300 meter tunneling work of these tunnels was completed and 5 of 856 viaduct of 13 thousand 80 meters in the same section was completed. Similarly, the construction of the 29 bin 806 meter 14 viaduct is continuing with the construction of a total of 6 tunnels of the 866 bin 16 meters between Vezirhan and Köseköy. While the 60 of the viaduct construction was completed, the tunnel length reached to 10 thousand 200 meters. Within a year, all the tunnels will be finished and it is aimed to pass to the railway laying and electrification stages.
The longest viaduct Turkey's current line, the first step was made in cutting the Ankara-Eskisehir. 3 viaduct with a total length of 999 thousand 4 meters was built. On this line, there is a tunnel with an 471 meter and an opening tunnel. 206 March 13, 2009, Ankara-Eskişehir line, began to travel. Even 13 March 2009-30 made a total 2011 3 thousand 906 people 857 journey between the dates of June XNUMX.
The second phase of the Ankara-Istanbul high-speed train project Kö İnönü-Vezirhan-Köseköy ce and the work on the line between the Gebze-Köseköy project under the Marmaray Project carried out by the General Directorate of DLH are also continuing. The double track railway between Köseköy and Gebze will be rebuilt and made suitable for high-speed train operations. Some places 3 will even be extracted. The project was completed and the tender for the 56 kilometer line was won by Societa Italiano Percondatte Spa Kolin Construction, 469,6 million liras. The tender is expected to be delivered to the winning company this month. The company will complete the job after 36 month delivery.