Otoyol 1 abbreviated as , aka İstanbul 1. Çevreyolu (Istanbul Inner Beltway), is a motorway in Istanbul

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...

, Turkey

Turkey

Turkey , known officially as the Republic of Turkey , is a Eurasian country located in Western Asia and in East Thrace in Southeastern Europe...

 that forms the inner half ring road

Ring road

A ring road, orbital motorway, beltway, circumferential highway, or loop highway is a road that encircles a town or city...

 of the city connecting Europe

Europe

Europe is, by convention, one of the world's seven continents. Comprising the westernmost peninsula of Eurasia, Europe is generally 'divided' from Asia to its east by the watershed divides of the Ural and Caucasus Mountains, the Ural River, the Caspian and Black Seas, and the waterways connecting...

an and Asia

Asia

Asia is the world's largest and most populous continent, located primarily in the eastern and northern hemispheres. It covers 8.7% of the Earth's total surface area and with approximately 3.879 billion people, it hosts 60% of the world's current human population...

n parts via the Bosphorus Bridge

Bosphorus Bridge

The Bosphorus Bridge, also called the First Bosphorus Bridge is one of the two bridges in Istanbul, Turkey, spanning the Bosphorus strait and thus connecting Europe and Asia The bridge is located between Ortaköy and Beylerbeyi The Bosphorus Bridge, also called the First Bosphorus Bridge is...

.

It starts Osmaniye neighborhood in Bakırköy

Bakirköy

This article is about a neighbourhood in IstanbulBakırköy is a neighborhood, municipality and district on the European side of İstanbul, Turkey. The quarter is densely populated, has a residential character and is inhabited by a middle class population...

 district on the European part, runs through the city over the Golden Horn

Golden Horn

The Golden Horn is a historic inlet of the Bosphorus dividing the city of Istanbul and forming the natural harbor that has sheltered Greek, Roman, Byzantine, Ottoman and other ships for thousands of...

 and the Bosporus

Bosporus

The Bosphorus or Bosporus , also known as the Istanbul Strait , is a strait that forms part of the boundary between Europe and Asia. It is one of the Turkish Straits, along with the Dardanelles...

, and terminates in Söğütlüçeşme neighborhood of 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...

 district on the Asian part. Otoyol 1 is toll-free, however the Bosporus Bridge is a toll bridge in the eastward direction only, having its toll plaza at the Asian side. O-1 is connected via three feeder highways to İstanbul 2. Çevreyolu (Istanbul Outer Beltway) .

District	km		Exit No.	Destinations	Notes
Bakırköy Bakirköy This article is about a neighbourhood in IstanbulBakırköy is a neighborhood, municipality and district on the European side of İstanbul, Turkey. The quarter is densely populated, has a residential character and is inhabited by a middle class population...	0	0	K1	Osmaniye
Fatih Fatih Fatih is a municipality and district in Istanbul, Turkey that encompasses most of the peninsula coinciding with historic Constantinople. In 2009, the district of Eminönü, formerly a separate municipality located at the tip of the peninsula, was merged into Fatih...	0.9	0.9	K2	Topkapı
Fatih Fatih Fatih is a municipality and district in Istanbul, Turkey that encompasses most of the peninsula coinciding with historic Constantinople. In 2009, the district of Eminönü, formerly a separate municipality located at the tip of the peninsula, was merged into Fatih...	1.7	2.6	K3	Vatan Cad.	Feeder to
Eyüp Eyüp -External links:* * * * *...	1.6	4.2	K4	Edirnekapı
Fatih Fatih Fatih is a municipality and district in Istanbul, Turkey that encompasses most of the peninsula coinciding with historic Constantinople. In 2009, the district of Eminönü, formerly a separate municipality located at the tip of the peninsula, was merged into Fatih...	1.2	5.4	K5	Ayvansaray
Fatih Fatih Fatih is a municipality and district in Istanbul, Turkey that encompasses most of the peninsula coinciding with historic Constantinople. In 2009, the district of Eminönü, formerly a separate municipality located at the tip of the peninsula, was merged into Fatih... , Beyoğlu Beyoglu Beyoğlu is a district located on the European side of İstanbul, Turkey, separated from the old city by the Golden Horn...				Golden Horn Bridge Golden Horn The Golden Horn is a historic inlet of the Bosphorus dividing the city of Istanbul and forming the natural harbor that has sheltered Greek, Roman, Byzantine, Ottoman and other ships for thousands of...
Beyoğlu Beyoglu Beyoğlu is a district located on the European side of İstanbul, Turkey, separated from the old city by the Golden Horn...	0.6	6.0	K6	Halıcıoğlu
Kagithane Kagithane Kağıthane is a working class district of the city of Istanbul, Turkey, in a valley inland from the upmarket Etiler. Built along a stream that runs into the Golden Horn. The mayor is Fazlı Kılıç .-History:...	1.8	7.8	K7	Okmeydanı	Feeder to
Şişli Sisli Şişli is one of 39 districts of Istanbul, Turkey. Located on the European side of the city, it is bordered by Beşiktaş to the east, Sarıyer to the north, Eyüp and Kağıthane to the west, and Beyoğlu to the south...	2.1	9.9	K8	Çağlayan	Piyalepaşa Ave.
Beşiktaş Besiktas Beşiktaş is a municipality of Istanbul, Turkey, located on the European shore of the Bosphorus. It is bordered on the north by Sarıyer and Şişli, on the west by Kağıthane and Şişli, on the south by Beyoğlu, and on the east by the Bosphorus...	2.9	12.8	K9	Barbaros	Barbaros Ave. Last exit before the toll bridge
Beşiktaş Besiktas Beşiktaş is a municipality of Istanbul, Turkey, located on the European shore of the Bosphorus. It is bordered on the north by Sarıyer and Şişli, on the west by Kağıthane and Şişli, on the south by Beyoğlu, and on the east by the Bosphorus...	1.0	13.8	K10	Balmumcu	Westbound only
Beşiktaş Besiktas Beşiktaş is a municipality of Istanbul, Turkey, located on the European shore of the Bosphorus. It is bordered on the north by Sarıyer and Şişli, on the west by Kağıthane and Şişli, on the south by Beyoğlu, and on the east by the Bosphorus...			V408 / V409	Ortaköy Viaduct 411 m (1,348.4 ft) / 362 m (1,187.7 ft)
Üsküdar Üsküdar Üsküdar is a large and densely populated municipality of Istanbul, Turkey, on the Anatolian shore of the Bosphorus. It is bordered on the north by Beykoz, on the east by Ümraniye, on the southeast by Ataşehir, on the south by Kadıköy, and on the west by the Bosphorus, with the areas of Beşiktaş,...				Bosphorus Bridge Bosphorus Bridge The Bosphorus Bridge, also called the First Bosphorus Bridge is one of the two bridges in Istanbul, Turkey, spanning the Bosphorus strait and thus connecting Europe and Asia The bridge is located between Ortaköy and Beylerbeyi The Bosphorus Bridge, also called the First Bosphorus Bridge is...  1074 m (3,523.6 ft)
Uskudar Üsküdar Üsküdar is a large and densely populated municipality of Istanbul, Turkey, on the Anatolian shore of the Bosphorus. It is bordered on the north by Beykoz, on the east by Ümraniye, on the southeast by Ataşehir, on the south by Kadıköy, and on the west by the Bosphorus, with the areas of Beşiktaş,...				Toll plaza of the Bosphorus Bridge Toll payment for east-bound only
Üsküdar Üsküdar Üsküdar is a large and densely populated municipality of Istanbul, Turkey, on the Anatolian shore of the Bosphorus. It is bordered on the north by Beykoz, on the east by Ümraniye, on the southeast by Ataşehir, on the south by Kadıköy, and on the west by the Bosphorus, with the areas of Beşiktaş,...	3.2	17.0	K11	Beylerbeyi Beylerbeyi Beylerbeyi is a neighborhood in the Üsküdar municipality of Istanbul, Turkey. It is located on the Asian shore of the Bosporus, to the north of the Bosphorus Bridge. It is bordered on the northeast by the neighborhood of Çengelköy, on the east by Kirazlıtepe, on the southeast by Küplüce, on the...
Üsküdar Üsküdar Üsküdar is a large and densely populated municipality of Istanbul, Turkey, on the Anatolian shore of the Bosphorus. It is bordered on the north by Beykoz, on the east by Ümraniye, on the southeast by Ataşehir, on the south by Kadıköy, and on the west by the Bosphorus, with the areas of Beşiktaş,...				Parking Area Westbound only
Üsküdar Üsküdar Üsküdar is a large and densely populated municipality of Istanbul, Turkey, on the Anatolian shore of the Bosphorus. It is bordered on the north by Beykoz, on the east by Ümraniye, on the southeast by Ataşehir, on the south by Kadıköy, and on the west by the Bosphorus, with the areas of Beşiktaş,...	1.6	18.6	K12	Altunizade	Last exit before the toll bridge Feeder to
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...				Acıbadem	Eastbound exit only (no entrance)
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...	2.0	20.6	K13	Çamlıca	Feeder to
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...	3.2	23.8	K14	Uzunçayır
Kadikoy 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...	2.0	25.8	K15	Söğütlüçeşme

External links

• Istanbul road map