M4 (Istanbul Metro)

M4 Kadıköy–Kartal
300px Yenisahra station
Overview
Type	Rapid Transit
System	İstanbul Metro
Status	Opened (3 stations are still under construction)
Locale	İstanbul, Turkey
Termini	Kadıköy Kartal
Stations	16 (3 more under construction)
Services	1
Operation
Opened	17 August 2012 (2012-08-17)
Owner	İstanbul Metropolitan Municipality
Operator(s)	İstanbul Ulaşım A.Ş.
Depot(s)	Maltepe
Rolling stock	144 CAF
Technical
Line length
Track gauge	1,435 mm (4 ft 8 1⁄2 in) standard gauge
Operating speed
Route number	M4
Route map Legend Line M4 Kadıköy Ayrılık Çeşmesi Acıbadem Ünalan Göztepe Yenisahra Kozyatağı Bostancı Küçükyalı Maltepe Depot Maltepe Huzurevi Gülsuyu Esenkent Hastane - Adliye Soğanlık Kartal Yakacık Pendik Kaynarca Marmara E.A Hastanesi Şeyhli Sanayi Sabiha Gökçen International Airport

M4, officially referred to as the M4 Kadıköy–Kartal line (Turkish: M4 Kadıköy–Kartal Metro Hattı), is a 21.7-kilometre (13.5 mi), 16-station rapid transit line of the Istanbul Metro. Running between Kadıköy and Kartal, it is the only rapid transit line operating on the Asian side of Istanbul. The M4 mostly runs under State road D100, parallel to the Istanbul-Ankara Main Line and is entirely underground.

The M4 opened on 17 August 2012 with a large ceremony in Kadıköy, in which Recep Tayyip Erdoğan personally took part in. 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.

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. In mid-2010, the construction of the tunnels was completes, and the track laying started. The route has connections with TCDD's Marmaray system at Ayrılıkçeşmesi and the İstanbul Metrobus system at Ünalan. Scheduled opening date was December 2011 up to Kartal, however it was postponed due to signalization works.

Stations

• Kadıköy (transfer to: T3, İDO)
• Ayrılık Çeşmesi (transfer to: Marmaray)
• Acıbadem
• Ünalan (transfer to: Metrobüs)
• Göztepe
• Yenisahra
• Kozyatağı
• Bostancı
• Küçükyalı
• Maltepe
• Huzurevi
• Gülsuyu
• Esenkent
• Hastane - Adliye
• Soğanlık
• Kartal
• Yakacık (under construction)
• Pendik (under construction)
• Kaynarca (under construction)

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 operations 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 2015 when the line extends there .

Train frequency is currently every 150 seconds, and will 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 the double capacity. Ridership capacity in one direction is 70,000 passengers hourly. Total travel time of the entire line is 35 minutes.

Rolling Stock

M4 is operated by CAF trains (144 cars in total) every 3.5 minutes during peak hours. The frequency is less on weekends and during off-peak hours.

See also

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

External links

Media related to at Wikimedia Commons

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