Orhangazi Tunnel
| Overview | |
|---|---|
| Location | Orhangazi, Bursa Province - Yalova Province |
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| Status | Open |
| Route | O-5 |
| Operation | |
| Work begun | February 15, 2012 |
| Opened | April 2016 |
| Owner | General Directorate of Highways |
| Traffic | automotive |
| Character | Twin-tube motorway tunnel |
| Technical | |
| Construction | Otoyol A.Ş. |
| Length | 3,586 m (11,765 ft) |
| Number of lanes | 2 x 3 |
The Orhangazi Tunnel (Turkish: Orhangazi Tüneli), is a motorway tunnel located at Samanlı Mountains in Marmara Region as part of the Istanbul-Bursa Motorway O-5 in Turkey.[1]
Situated northeast of Orhangazi town between Laladere and Yeniköy villages on the province border of Yalova and Bursa,[2] it is a twin-tube tunnel of length 3,417 m (11,211 ft) carrying three lanes of traffic in each direction. The construction works began on February 15, 2012,[2] and are being carried out by Otoyol A.Ş., a consortium of Turkish Nurol, Özaltın, Makyol, Yüksel, Göçay and Italian Astaldi companies.[3] The New Austrian Tunnelling method (NATM) was applied for the boring of the tunnel.[4][5]
Breakthrough in one of the tubes was achieved on February 19, 2014 after two years and four days of work. A related ceremony was held at site in presence of Deputy Prime Minister Bülent Arınç and Minister of Transport, Maritime and Communication Lütfi Elvan on March 3, 2014.[5] It is the longest motorway tunnel of Turkey.[1][3][6] The tunnel's opening to traffic was in April 2016.
Other tunnels on the route are the 1,234 m (4,049 ft)-long Selçukgazi Tunnel and the 1,747 m (5,732 ft)-long Belkahve Tunnel, which are under construction.[7]
References
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Tunnels in italic are under construction
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