Haydarpaşa-Adapazarı Bölgesel Ekspresi
Encyclopedia
The Haydarpaşa-Adapazarı Regional also referred to as Adapazarı Express is a regional rail
Regional rail
Commuter rail, also called suburban rail, is a passenger rail transport service that primarily operates between a city center, and the middle to outer suburbs beyond 15km and commuter towns or other locations that draw large numbers of commuters—people who travel on a daily basis...

 service, that runs between İstanbul
Istanbul
Istanbul , historically known as Byzantium and Constantinople , is the largest city of Turkey. Istanbul metropolitan province had 13.26 million people living in it as of December, 2010, which is 18% of Turkey's population and the 3rd largest metropolitan area in Europe after London and...

 and Adapazarı
Adapazari
Adapazarı is a city in northwestern Turkey and the capital of Sakarya Province. The province itself was originally named Adapazarı as well. Adapazarı is a part of the densely populated region of the country, known as the Marmara Region. As of 2010, the city has a population of 560,876 ...

. It is the second busiest route of the Turkish State Railways
Turkish State Railways
The State Railways of the Turkish Republic or TCDD is the government owned, national railway carrier in the Republic of Turkey, headquartered in Ankara...

, after the Adana-Mersin Regional
Adana-Mersin Regional
The Adana Mersin Regional is an intercity rail service operated by the Turkish State Railways. It operates between two major cities of Turkey; Adana and Mersin. It also services Tarsus . The trains operate on the Adana-Mersin Main Line, the second busiest rail line in Turkey.-Stations:-External...

. It serves a heavily populated region on the north-east shores of the Sea of Marmara
Sea of Marmara
The Sea of Marmara , also known as the Sea of Marmora or the Marmara Sea, and in the context of classical antiquity as the Propontis , is the inland sea that connects the Black Sea to the Aegean Sea, thus separating Turkey's Asian and European parts. The Bosphorus strait connects it to the Black...

, and the Sakarya plain. Service is frequent with 12 trains daily in each direction. Trains serve these important districts of İstanbul
Istanbul
Istanbul , historically known as Byzantium and Constantinople , is the largest city of Turkey. Istanbul metropolitan province had 13.26 million people living in it as of December, 2010, which is 18% of Turkey's population and the 3rd largest metropolitan area in Europe after London and...

: Kadıköy
Kadiköy
Kadıköy is a large, populous, and cosmopolitan district of İstanbul, Turkey on the Asian side of the Sea of Marmara, facing the historic city centre on the European side of the Bosporus...

, Maltepe
Maltepe
Maltepe is a district in the suburbs of Istanbul, Turkey between Kadıköy and Kartal on the Marmara sea. Its neighbours are Kadıköy to the west and Kartal to the east. The mayor of Maltepe is Mustafa Zengin . Maltepe used to border Ümraniye from the northwest between 1992 and 2004...

, Kartal
Kartal
Kartal is a district of Istanbul, Turkey located on the Asian side of the city, on the coast of the Marmara Sea between Maltepe and Pendik. The mayor is Altınok Öz . Despite being far from the city centre, Kartal is heavily populated now. . Total land area is 147,000 m² which includes some...

, Pendik
Pendik
Pendik is a district of Istanbul, Turkey on the Asian side between Kartal and Tuzla, on the Marmara Sea. Its population is 625.365 and its mayor is Salih Kenan Şahin .-History:...

, Tuzla
Tuzla
Tuzla is a city and municipality in Bosnia and Herzegovina. At the time of the 1991 census, it had 83,770 inhabitants, while the municipality 131,318. Taking the influx of refugees into account, the city is currently estimated to have 174,558 inhabitants...

 as well as Gebze
Gebze
Gebze is an industrial city in Kocaeli Province, Turkey. Situated 30 miles east of Istanbul on the northern shore of the Sea of Marmara, it is the largest district of Kocaeli; Gebze has experienced rapid growth in recent years- from 159,116 in 1990, to 282,444 in 2009. Gebze accounts for 15% of...

, İzmit
Izmit
İzmit is a city in Turkey, administrative center of Kocaeli Province as well as the Kocaeli Metropolitan Municipality. It is located at the Gulf of İzmit in the Sea of Marmara, about east of Istanbul, on the northwestern part of Anatolia. The city center has a population of 294.875...

 and Adapazarı
Adapazari
Adapazarı is a city in northwestern Turkey and the capital of Sakarya Province. The province itself was originally named Adapazarı as well. Adapazarı is a part of the densely populated region of the country, known as the Marmara Region. As of 2010, the city has a population of 560,876 ...

. Because of the cities the trains service, it has earned the nickname Metropolitan Express.

Equipment

Trains are usually 6-8 cars long with a single electric locomotive
Electric locomotive
An electric locomotive is a locomotive powered by electricity from overhead lines, a third rail or an on-board energy storage device...

 pulling the train. Today, trains are usually equipped mostly with the Regional Fleet
TCDD Regional Fleet
The Regional Fleet of the Turkish State Railways are a series of railcars used for regional or commuter service. These cars were used in Ankara, İstanbul, İzmir and Adana. Today, they are only used in Istanbul on the Haydarpaşa-Adapazarı Regional....

 and a few Intercity Fleet cars. On occasion a train may be double-headed for special purposes.

In the past the electric locomotives that pulled trains were the E40000
TCDD E40000
TCDD E40000 is a series of electric locomotives used by the Turkish State Railways. The batch consisted of 15 units delivered in 1969. The locomotives have a power output of 2,945 kW and are capable of 130 km/h.-External links:*...

 or the E52500
TCDD E52500
TCDD E52500 is a series of electric locomotives used by the Turkish State Railways, comprising 22 class 441-9 locomotives leased from Željeznice Federacije Bosne i Hercegovine in Bosnia-Herzegovina. They are used throughout the electrified parts of the Turkish rail network...

 series and cars consisted of black and red regional cars that were built by TÜVASAŞ
TÜVASAS
Türkiye Vagon Sanayi Anonim Şirketi, more commonly known as TÜVASAŞ, is a railcar manufacturer based in Adapazarı. TÜVASAŞ is responsible for the construction, refurbishment and repair of railcars for the Turkish State Railways, and is a 100% shareholding of the Turkish State Railways, reporting...

 primarily for this service. Also during the 1990s, MT5600
TCDD MT5600
TCDD MT5600 branded as Sakarya is a series of 11 diesel railcars operated by the Turkish State Railways. They were produced by Tüvasaş.-External links:* *...

 were used for a brief period of time, but due to ridership these DRCs couldn't handle the capacity. Today's trains use refurbished regional and intercity cars that came into service in the 1970s, with the conductor car being either the first or last car. The E43000
TCDD E43000
TCDD E43000 is a series of electric locomotives used by the Turkish State Railways. The batch consisted of 45 units delivered in 1987 and used throughout the electrified parts of the Turkish rail network. The locomotives have a power output of 3,180 kW and are capable of...

 are the only type of locomotives that are used for pulling trains, as well as pulling express service on the line to Ankara and other cities. Also the route is the last stronghold for regional cars, as they were replaced with DMUs on other routes. Sometimes E14000
TCDD E14000
TCDD E14000 is an electric multiple unit used by the Turkish State Railways on their commuter rail services around Istanbul, Ankara and Izmir. The 75 units were delivered starting in 1979 to supplement the aging E8000 units that were in use on the European Istanbul service, when the other commuter...

 EMUs, used for commuter service in İstanbul and previously Ankara
Ankara
Ankara is the capital of Turkey and the country's second largest city after Istanbul. The city has a mean elevation of , and as of 2010 the metropolitan area in the entire Ankara Province had a population of 4.4 million....

, are used for special holidays or weekend service when extra equipment is needed.
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