Contents

M4 (Istanbul Metro)

Metro line in Istanbul

M4 Kadıköy–Sabiha Gökçen Airport
Sabiha Gökçen Airport Station
Overview
Status	Operating Kadıköy - Sabiha Gökçen Airport Construction M4ʙ (Tavşantepe - İçmeler/Tuzla Bld.) Project M4ᴀ (Sabiha Gökçen Air. - Kurtköy YHT/ViaPort) M4ʙ (İçmeler/Tuzla Bld. - Tuzla)
Owner	Istanbul Metropolitan Municipality
Locale	Istanbul, Turkey
Termini	Kadıköy station, Kadıköy Sabiha Gökçen Airport station, Pendik
Stations	23
Website	M4
Service
Type	Rapid transit
System	Istanbul Metro
Services	1
Route number	M4
Operator(s)	Metro Istanbul A.Ş.
Depot(s)	Maltepe
Rolling stock	144 CAF[1] 4 carriages per trainset
Daily ridership	134,524 (2013)[citation needed]
History
Opened	17 August 2012; 11 years ago (2012-08-17)
Technical
Line length	33.5 km (20.8 mi)
Number of tracks	2
Track gauge	1,435 mm (4 ft 8+1⁄2 in) standard gauge
Electrification	1,500 V DC Overhead line
Operating speed	80 km/h (50 mph)
Route map Legend Kadıköy Ayrılık Çeşmesi Acıbadem Ünalan Göztepe Yenisahra Kozyatağı Bostancı Küçükyalı Maltepe Yard Maltepe Huzurevi Gülsuyu Esenkent Hastane—Adliye Soğanlık Kartal Yakacık—Adnan Kahveci Pendik Tavşantepe Fevzi Çakmak—Hastane Yayalar—Şeyhli Kurtköy S. Gökçen Havalimanı Kaynarca Merkez Çamçeşme Kavakpınar Esenyalı Aydıntepe İçmeler

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.

History[edit]

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[edit]

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	Kadıköy	17 August 2012	Şehir Hatları İDO Turyol 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 Havabüs T3 Nostagic Tram Line
Ayrılık Çeşmesi		29 October 2013	TCDD Taşımacılık: Marmaray İETT Bus:
Acıbadem		17 August 2012	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			Metrobus: 34A, 34AS, 34G, 34Z 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 Havabüs
Göztepe			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			Istanbul Metro: M12 İETT Bus: 8A, 8Y Havabüs
Kozyatağı			Istanbul Metro: M8 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			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	Maltepe		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			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			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			İETT Bus: 16B, 16C, 16KH, 16S, 16U, 16Y, 16Z, 17K, 17P, 21K, 21U, 130, 130A, 130Ş, 133N, 251, 500T, E-10
Esenkent			İETT Bus: 16B, 16C, 16KH, 16S, 16U, 16Y, 16Z, 17K, 17P, 21K, 21U, 130, 130A, 130Ş, 500T, E-10, KM30, KM33
Hastane -Adliye	Kartal		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			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			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		10 October 2016	İETT Bus: 16C, 16KH, 16Z, 17K, 17P, 130, 130A, 130E, 130Ş, 132G, 132Ş, 132T, 251, 500T, E-10, KM11, KM12, KM23, KM25, KM29
Pendik	Pendik		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			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		2 October 2022	İETT Bus: 16KH, 132P, 132V, 132Y, KM29
Yayalar - Şeyhli			İETT Bus: 16KH, 132, 132A, 132B, 132D, 132E, 132H, 133GP, 133Ü, E-10, KM18, KM25, KM27, KM28, KM29
Kurtköy			İETT Bus: 16KH, 132, 132A, 132B, 132D, 132E, 132H, 133GP, 133Ü, E-10, KM18, KM25, KM27, KM28, KM29, KM37
Sabiha Gökçen Airport			TCDD Taşımacılık: Yüksek Hızlı Tren (planned) İETT Bus: E-3, E-9, E-10, E-11 Havabüs SG-1, SG-2

Specifications[edit]

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 when the line extends there .^[10]

Train frequency is currently every 5 minutes during peak hours and technically could be shortened to 90 seconds.^[2] Trains remain at stations for an average of 15 seconds. Four-car trains have a 1,309 passenger capacity and eight-car trains have 2,618^[11] capacity. Ridership capacity in one direction is 70,000 passengers hourly. Total travel time of the entire line is around 52 minutes.^[2][10]

Rolling stock[edit]

M4 is operated by CAF trains (144 cars in total) every 5 minutes during peak hours. The frequency is much less on weekends and during off-peak hours.

See also[edit]

• Istanbul modern tramways
• Istanbul nostalgic tramways
• Marmaray
• Public transport in Istanbul
• Istanbul Metro

References[edit]

External links[edit]

Media related to Istanbul Metro line M4 at Wikimedia Commons

• İstanbul Ulaşım – M4 Kadikoy-Kartal Metro Line (official webpage)