Nurdağı Tunnel

Overview
Other name(s)	Fevzipaşa bypass
Line	Mersin-Gaziantep railway
Location	Between Bahçe and Nurdağı, Turkey
Status	Under construction
System	Turkish State Railways
Crosses	Nur Mountains, near the Bahçe pass
Operation
Work begun	2014[1]
Opened	2024 (Scheduled)
Owner	Turkish State Railways
Character	Mountain tunnel
Technical
Length	9,950 m (32,640 ft)[2][3]
No. of tracks	2
Track gauge	1,435 mm (4 ft 8+1⁄2 in)
Electrified	25 kV, 50 Hz
Operating speed	120 km/h (75 mph)[4]
Route map
Legend km Adana-Aleppo railway to Adana 0 Bahçe D.400 Bahçeşehir Nurdağı Tunnel Fevzipaşa-Kurtalan railway to Kurtalan Nurdağı Ayran Tunnel Fevzipaşa Adana-Aleppo railway to İslahiye This diagram: view talk edit

The Nurdağı Tunnel (Turkish: Nurdağı Tüneli) is a 9,950 m (32,640 ft) long twin-tube railway tunnel, currently under construction in southern Turkey. Passing through the Nur Mountains, near the east end of the Amanian Gate, it will carry passenger and freight trains along with high-speed trains, as part of the Mersin-Adana-Gaziantep high-speed railway.^[4] Upon completion, it will become the longest railway tunnel in Turkey, surpassing the 5,473 m (17,956 ft) long Deliktaş Tunnel in Sivas.^[2]

The Nurdağı Tunnel will also relive a cumbersome bottleneck caused by the original alignment of the Baghdad Railway. Trains passing through the Nur Mountains use the Ayran Tunnel to Fevzipaşa, where the junction with the Fevzipaşa-Kurtalan railway is. However the alignment of the tracks only allows access from the south; meaning trains must stop at Fevzipaşa and the locomotive must reverse directions before continuing north through the junction. Since the construction of a wye or loop is not possible, due to the steep terrain, the maneuvers at Fevzipaşa greatly hamper transit times on Turkey's busiest freight corridor. The Nurdağı Tunnel will bypass Fevzipaşa altogether, with a direct route from Bahçe, on the Adana-Aleppo railway, to Nurdağı, on the Fevzipaşa-Kurtalan railway. Due to this bypass, the tunnel has also been named the Fevzipaşa bypass (Turkish: Fevzipaşa varyantı). The entire length of the bypass (including the tunnel) is about 17 km (11 mi).^[3]

v t e Tunnels in Turkey
Road tunnels	19 Mayıs (2009) 75th Anniversary Selatin (2000) 8 Ağustos (2009) Adnan Sezgin (2010) Altan Ayağ (2010) Araklı (2007) Arhavi (2007) Asarkayası (2007) Aslanlı (1999) Ayran (1999) Bartın-Amasra (2014) Bayraklı (2007) Bayramca (2013) Belkahve (2017) Beylerbeyi Palace (1832) Boğsak (2014) Boztepe (2019) Buca Onat (2025) Buruncuk (2019) Cankurtaran (2018) Çakıt (2009) Çayeli (2007) Çiftlik (2014) Demirciköy (2014) Dolmabahçe-Bomonti (2010) Dranaz (2009) Elceğiz (1998) Erkenek (2017) Ertuğrulgazi (2010) Eurasia (2016) Gerze (2014) Göcek (2006) Gültepe (1984) Güvenlik (2008) Havza (2009) Hereke (1984) Honaz (2023) Ilgaz (2016) İğdir (2005) Kadıoğlu (2007) Kağıthane–Piyalepaşa (2009) Karahan (2016) Kırkgeçit (2009) Kıyıcık (2007) Kızılcahamam–Çerkeş (2021) Kızlaç (1999) Kiliseburnu (2007) Konak (2015) Kopmuş (2007) Korutepe (1984) Kozbükü (2007) Mount Bolu (2007) Mount Ilgar Mount Kop Ordu Nefise Akçelik (2007) Orhan Büyükalp (2010) Orhangazi (2016) Osmangazi (2010) Ovit (2018) Öceli (2019) Pazar (2007) Sabuncubeli (2018) Salmankaş (2019) Sarayköy (2007) Sarıyer-Çayırbaşı (2012) Selçukgazi (2017) Selimiye (2010) Şehzadeler (2009) Taşoluk (1999) Tekkebak (2007) Terzili Tirebolu-1 (2008) Topçam (2018) Yenikent (2012) Yunus Emre (2013) Zigana (1988) Zigana (2023)
Railway tunnels	Ayaş Ayran (1917) Deliktaş (2012) Karşıyaka (2010) Marmaray (2013) Nurdağı (2024) Soğucak (1912) Şirinyer (2010)
Road-rail tunnels	Great Istanbul Tunnel
Water tunnels	Şanlıurfa Irrigation Tunnels (2005) Bosporus Water Tunnel (2012) Golden Horn Water Tunnel (2012) Suruç Water Tunnel (2014) Blue Tunnel Project (2015)
Historical tunnels	Pergamon Bridge Nysa Bridge Vespasianus Titus Tunnel
Tunnels in italic are under construction