M4 (Istanbul Metro)

The M4, officially referred to as the M4 Kadıköy - Sabiha Gökçen Airport metro line (Turkish: M4 Kadıköy–Sabiha Gökçen Havalimanı metro hattı), is a 33.5-kilometre (20.8 mi), 23-station[2] rapid transit line of the Istanbul Metro. It is colored deep pink on the maps and route signs. Running between Kadıköy and Sabiha Gökçen Airport, it is the first rapid transit line operating on the Asian side of Istanbul. The M4 mostly runs under State road D100, parallel to the Istanbul-Ankara railway and is entirely underground.

M4 Kadıköy–Sabiha Gökçen Airport
Sabiha Gökçen Airport Station
Overview
StatusOperating
Kadıköy - Sabiha Gökçen Airport
Construction
M4ʙ (Tavşantepe - İçmeler/Tuzla Bld.)
Project
M4ᴀ (Sabiha Gökçen Air. - Kurtköy YHT/ViaPort)
M4ʙ (İçmeler/Tuzla Bld. - Tuzla)
OwnerIstanbul Metropolitan Municipality
LocaleIstanbul, Turkey
Termini
Stations23
WebsiteM4
Service
TypeRapid transit
SystemIstanbul Metro
Services1
Route numberM4
Operator(s)Metro Istanbul A.Ş.
Depot(s)Maltepe
Rolling stock144 CAF[1]
4 carriages per trainset
Daily ridership134,524 (2013)
History
Opened17 August 2012 (2012-08-17)
Technical
Line length33.5 km (20.8 mi)
Number of tracks2
Track gauge1,435 mm (4 ft 8+1⁄2 in) standard gauge
Electrification1,500 V DC Overhead line
Operating speed100 km/h (62 mph)
Route map

 Kadıköy Line T3 İDO Ferries in Istanbul
 Ayrılık Çeşmesi Marmaray
 Acıbadem
 Ünalan Metrobus (Istanbul)
 Göztepe
 Yenisahra
 Kozyatağı Line M8
 Bostancı
 Küçükyalı
Maltepe Yard
 Maltepe
 Huzurevi
 Gülsuyu
 Esenkent
 Hastane—Adliye
 Soğanlık
 Kartal
 Yakacık—Adnan Kahveci
 Pendik
 Tavşantepe
Fevzi Çakmak
 Yayalar
 Kurtköy
 S. Gökçen Havalimanı Sabiha Gökçen International Airport
 Kaynarca Merkez
 Çamçeşme
 Kavakpınar
 Esenyalı
 Aydıntepe
 İçmeler Marmaray

History

A plan to build a subway line on the Asian side of İstanbul was approved in 2005. In 2008, a €751 million construction contract was awarded to a consortium of Astaldi, Makyol and Gülermak. The rolling stock was ordered from the Spanish company CAF.[3] In mid-2010, the construction of the tunnels was completed and the track laying started. The route has connections with TCDD's Marmaray system at Ayrılıkçeşmesi and the Istanbul Metrobus system at Ünalan. The scheduled opening date was December 2011 up to Kartal, but it was postponed because of signalization works.[4]

The M4 opened on 17 August 2012 with a large ceremony in Kadıköy, attended by Prime Minister Recep Tayyip Erdoğan.[5] On 29 October 2013, with the opening of Marmaray rail service under the Bosphorus, Ayrılık Çeşmesi station was opened to allow passengers to transfer between lines.[6][7] On 10 October 2016, 3 new stations were added to the line (Yakacık Station, Pendik Station and Tavşantepe Station).[8] On 2 October 2022, 4 new station were added to the line (Fevzi Çakmak Station, Yayalar Station, Kurtköy Station and Sabiha Gökçen Airport Station). Thus, the length of the line reached 33.5 km.[9]

Stations

The M4 has a total of 23 stations in operation, with 6 more under construction.

M4 Kadıköy - Sabiha Gökçen Airport
Station District Opened Connections
Kadıköy Disabled access Kadıköy 17 August 2012 ferry/water interchange Şehir Hatları
Kadıköy Ferry Terminal İDO
ferry/water interchange Turyol
Bus interchange İETT Bus: 1, 3, 3A, 3B, 8, 8A, 11D, 12A, 12H, 13, 13B, 13Y, 14, 14A, 14C, 14D, 14DK, 14E, 14F, 14K, 14KS, 14M, 14R, 14S, 14ŞB, 14Y, 15BK, 15F, 15TK, 16, 16D, 16K, 16KH, 16Y, 17, 17L, 18K, 19, 19EK, 19F, 19S, 21A, 21C, 21G, 21K, 21U, 110, 120M, 125, 130Ş, 222, 319, 500A, 500T
Bus interchange Havabüs

T3 Nostagic Tram Line

Ayrılık Çeşmesi Disabled access 29 October 2013 Mainline rail interchange TCDD Taşımacılık: Marmaray
Bus interchange İETT Bus:
Acıbadem Disabled access 17 August 2012 Bus interchange İETT Bus: 3A, 11T, 13M, 13Y, 14A, 14BK, 14DK, 15BK, 16A, 16B, 16C, 16F, 16KH, 16M, 16U, 16Y, 16Z, 17K, 18E, 18K, 18Y, 18Ü, 19, 19A, 19B, 19E, 19FK, 19H, 19T, 19Z, 20E, 20Ü, 21B, 21C, 21G, 21K, 21U, 130, 130A, 130Ş, 319, 320A, E-10, E-11
Ünalan Disabled access Bus rapid transit Metrobus: 34A, 34AS, 34G, 34Z
Bus interchange İETT Bus: 3A, 11T, 130, 13M, 13Y, 14A, 14BK, 14DK, 15BK, 16A, 16, B, 16C, 16F, 16KH, 16M, 16S, 16U, 16Y, 16Z, 17K, 17P, 18A, 18E, 18K, 18M, 18Ü, 18V, 18Y, 19, 19A, 19B, 19E, 19FK, 19H, 19T, 19Z, 20E, 20Ü, 21B, 21C, 21G, 21K, 21U, 130A, 130Ş, 319, 320A, E-10, E-11
Bus interchange Havabüs
Göztepe Disabled access Bus interchange İETT Bus: 3A, 8E, 9K, 10E, 10G, 11T, 13M, 13Y, 14A, 14B, 14BK, 14ES, 15BK, 15ÇK, 15SK, 16A, 16B, 16C, 16F, 16KH, 16M, 16S, 16U, 16Y, 16Z, 17K, 17P, 18A, 18E, 18K, 18M, 18Ü, 18V, 18Y, 19, 19A, 19B, 19E, 19FK, 19H, 19T, 19Z, 20D, 20E, 20K, 20Ü, 21B, 21C, 21G, 21K, 21U, 129T, 130, 130A, 130Ş, 202, 251, 252, 319, 320A, E-10, E-11
Yenisahra Disabled access Metro interchange Istanbul Metro: M12
Bus interchange İETT Bus: 8A, 8Y
Bus interchange Havabüs
Kozyatağı Disabled access Metro interchange Istanbul Metro: M8
Bus interchange İETT Bus: 14KS, 14T, 15KB, 16A, 16B, 16C, 16F, 16FK, 16KH, 16S, 16U, 16Y, 16Z, 17K, 17P, 19, 19B, 19FK, 19H, 19Z, 21B, 21C, 21G, 21K, 21U, 129L, 129T, 130, 130A, 130Ş, 251, 252, 319, 500T, E-10
Bostancı Disabled access Bus interchange İETT Bus: 10, 13AB, 14KS, 14T, 15KB, 16A, 16B, 16C, 16F, 16KH, 16S, 16U, 16Y, 16Z, 17K, 17P, 19, 19B, 19D, 19FK, 19H, 19SB, 19Z, 21B, 21C, 21G, 21K, 21U, 129L, 130, 130A, 130Ş, 251, 319, 500T, E-10
Küçükyalı Disabled access Maltepe Bus interchange İETT Bus: 16A, 16B, 16C, 16KH, 16S, 16U, 16Y, 16Z, 17K, 17P, 19B, 19H, 19Z, 21C, 21G, 21K, 21U, 130, 130A, 130Ş, 251, 500T, KM41, KM45
Maltepe Disabled access Bus interchange İETT Bus: 16A, 16B, 16C, 16KH, 16S, 16U, 16Y, 16Z, 17K, 17P, 21C, 21G, 21K, 21U, 130, 130A, 130Ş, 133N, 251, 500T, E-10, KM42, KM43, KM44
Huzurevi Disabled access Bus interchange İETT Bus: 16B, 16C, 16KH, 16S, 16U, 16Y, 16Z, 17K, 17P, 21C, 21G, 21K, 21U, 130, 130A, 130Ş, 133N, 136, 136R, 136Z, 251, 500T, E-10
Gülsuyu Disabled access Bus interchange İETT Bus: 16B, 16C, 16KH, 16S, 16U, 16Y, 16Z, 17K, 17P, 21K, 21U, 130, 130A, 130Ş, 133N, 251, 500T, E-10
Esenkent Disabled access Bus interchange İETT Bus: 16B, 16C, 16KH, 16S, 16U, 16Y, 16Z, 17K, 17P, 21K, 21U, 130, 130A, 130Ş, 500T, E-10, KM30, KM33
Hastane -Adliye Disabled access Kartal Bus interchange İETT Bus: 16C, 16KH, 16S, 16U, 16Z, 17K, 17P, 21K, 17S, 21K, 21U, 130, 130A, 130E, 130Ş, 132G, 134YK, 251, 500T, E-10, KM11, KM21, KM23, KM25, KM29, KM32, KM60, KM70, KM71
Soğanlık Disabled access Bus interchange İETT Bus: 16C, 16KH, 16S, 16Z, 17K, 17P, 21K, 130, 130A, 130E, 130Ş, 132G, 132M, 134GK, 251, 500T, E-10, KM11, KM12, KM21, KM23, KM25, KM29, KM32, KM60, KM70, KM71
Kartal Disabled access Bus interchange İETT Bus: 16C, 16KH, 16S, 16Z, 17K, 17P, 21K, 130, 130A, 130E, 130Ş, 131K, 131V, 131Y, 132C, 132ÇK, 132G, 132M, 132N, 132S, 132T, 132Y, 132Z, 134, 134CK, 134GK, 134K, 134UK, 251, 500T, E-10, KM11, KM12, KM21, KM23, KM25, KM29, KM31, KM32, KM60, KM70, KM71
Yakacık -Adnan Kahveci Disabled access 10 October 2016 Bus interchange İETT Bus: 16C, 16KH, 16Z, 17K, 17P, 130, 130A, 130E, 130Ş, 132G, 132Ş, 132T, 251, 500T, E-10, KM11, KM12, KM23, KM25, KM29
Pendik Disabled access Pendik Bus interchange İETT Bus: 16C, 16KH, 16Z, 17K, 17P, 130, 130A, 130E, 130G, 130Ş, 132, 132A, 132B, 132D, 132E, 132H, 132K, 132P, 132G, 133GP, 132T, 132Y, 251, 500T, E-9, E-10, KM10, KM11, KM12, KM13, KM23, KM24, KM25, KM28, KM29
Tavşantepe Disabled access Bus interchange İETT Bus: 16KH, 17K, 17P, 130, 130A, 130E, 130Ş, 132F, 132T, 132Y, 500T, E-9, KM2, KM10, KM11, KM12, KM13, KM14, KM23, KM24, KM29
Fevzi Çakmak - Hastane Disabled access 2 October 2022 Bus interchange İETT Bus: 16KH, 132P, 132V, 132Y, KM29
Yayalar - Şeyhli Disabled access Bus interchange İETT Bus: 16KH, 132, 132A, 132B, 132D, 132E, 132H, 133GP, 133Ü, E-10, KM18, KM25, KM27, KM28, KM29
Kurtköy Disabled access Bus interchange İETT Bus: 16KH, 132, 132A, 132B, 132D, 132E, 132H, 133GP, 133Ü, E-10, KM18, KM25, KM27, KM28, KM29, KM37
Sabiha Gökçen Airport Disabled access Mainline rail interchange TCDD Taşımacılık: Yüksek Hızlı Tren (planned)

Bus interchange İETT Bus: E-3, E-9, E-10, E-11

Bus interchange Havabüs SG-1, SG-2

Specifications

The stations Kadıköy, Ayrılıkçeşmesi, Ünalan and Göztepe are situated below sea level. The average distance between the stations is 1,300 m (1,400 yd). The distance between the stations at Maltepe and Huzurevi is the shortest at 800 m (870 yd). The distance between Bostancı and Küçükyalı is the longest with 2,300 m (2,500 yd). The Operation Control Center of the line is situated in Esenkent and the depot is located in Maltepe. Another depot is to be built in Kaynarca in 2016 when the line extends there .[10]

Train frequency is currently every 150 seconds during peak hours and could be shortened to 90 seconds later on. Trains remain at stations for an average of 15 seconds. Four-car trains have a 1,000 passenger capacity and eight-car trains have 2,000 capacity. Ridership capacity in one direction is 70,000 passengers hourly. Total travel time of the entire line is around 40 minutes.[10]

Rolling Stock

M4 is operated by CAF trains (144 cars in total) every 150 seconds during peak hours. The frequency is much less on weekends and during off-peak hours.

See also

References
  1. "Kadıköy-Kartal Metro Hattı 144 Adet Metro Aracı Alımı İşi" (in Turkish). İstanbul Büyükşehir Belediyesi. Archived from the original on 2013-10-12. Retrieved 2013-11-16.
  2. "Kadıköy-Sabiha Gökçen Havalimanı Metro Hattı".
  3. "Kadiköy - Kartal metro opened by Prime Minister". Railway Gazette International. 17 August 2012. Retrieved 4 October 2015.
  4. "Kadıköy-Kartal Metro Hattı Temmuzda Açılacak" (in Turkish). İstanbul Net. 2012-03-02. Retrieved 2013-11-16.
  5. "Yüzde 50 müjdesiyle geliyor". Hürriyet (in Turkish). 2012-08-17. Retrieved 2013-11-16.
  6. "Kadıköy - Kartal Metrosu Ayrılıkçeşme İstasyonu ihalesi" (in Turkish). Emlak Kulisi. 2012-07-11. Retrieved 2013-11-16.
  7. "Marmaray tunnel opens to link Europe with Asia". Railway Gazette International. 29 October 2013. Retrieved 4 October 2015.
  8. "İstanbul Büyükşehir Belediyesi". www.ibb.istanbul. Retrieved 2016-10-10.
  9. Tarihi, Giriş (2022-09-26). "Pendik Sabiha Gökçen Havalimanı Metro Hattı 2 Ekim'de açılıyor". Retrieved 2022-09-26.
  10. "Kadıköy-Kartal Metro Hattı" (in Turkish). İBB. Archived from the original on 2012-06-04. Retrieved 2012-12-11.

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