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Otoyol 2 (English: Motorway 2), abbreviated as 
O-2, locally referred to as 2. Çevreyolu[1] (English: The Second Beltway), is a motorwayinIstanbul, Turkey that forms the outer ring road of the city connecting European and Asian parts via the Fatih Sultan Mehmet Bridge.
| ||||
|---|---|---|---|---|
| The Second Beltway 2. Çevreyolu | ||||
 | ||||
| Route information | ||||
Part of  E80 | ||||
Part of  AH1 and  AH5 | ||||
| Length | 38 km (24 mi) | |||
| Restrictions | No through trucks or buses allowed on the Fatih Sultan Mehmet Bridge | |||
| Major junctions | ||||
| West end |  O-3 in Mahmutbey, Istanbul | |||
| East end |  D.100inKozyatağı, Istanbul | |||
| Location | ||||
| Country | Turkey | |||
| Regions | Marmara | |||
| Provinces | Istanbul Province | |||
| Major cities | Istanbul | |||
| Highway system | ||||
| ||||
It starts in Mahmutbey East on the European part, where the Avrupa Otoyolu (English: Europe Motorway) O-3 links, runs through the northern outskirts of the city passing over the Bosporus Strait, and terminates at the western end of the Anadolu Otoyolu (English: Anatolia Motorway) 
O-4, before the toll plaza is situated. Otoyol 2 is toll-free, however the Fatih Sultan Bridge is a toll bridge in the eastward direction only, having its toll plaza at the European side. O-2 is connected via three feeder highways to İstanbul 1. Çevreyolu (First Beltway) 
O-1 and one highway to Avrupa Otoyolu (Europe Motorway). As the connecting highway of the motorways O-3 and O-4, it is part of the international routes European E80 and Asian AH1.
This article contains a bulleted list or table of intersections which should be presented in a properly formatted junction table. Please consult this guideline for information on how to create one. Please improve this article if you can. (November 2021)
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| District | Km | Mi | Exit No. | Destinations | Notes |
|---|---|---|---|---|---|
| Bağcilar | 0.0 | 0.0 |  K19
|
O-3 E80-Fatih, Edirne
|
|
| Bağcilar | 2.2 | 1.4 |  K1
|
Fetih Cd. | No west bound entrance |
| Esenler | 3.8 | 2.4 | K2
|
Metris/Esenler Connector- O-3
|
|
| Esenler | 4.2 | 2.6 | K3
|
Eski Edirne Asf.-Arnavutköy | |
| Gaziosmanpaşa/Sultangazi | 7.3 | 4.5 | K4
|
Hekimsuyu Cd. | |
| Eyüpsultan | 8.7 | 5.4 | K5
|
O-2/O7 Connector- 
|
|
| Eyüpsultan | 11.5 | 7.1 |  K6
|
 -Hasdal,Kemerburgaz
|
|
| Eyüpsultan/Kağıthane | 12.6 | 7.8 | K7
|
Hasdal/Okmeydaı Connector- O-1
|
|
| Sarıyer | 16.0 | 9.9 | K8
|
Büyükdere Cd. | West bound entrance and east bound exit only |
| Beşiktaş | 16.6 | 10.3 | 
|
Harp Akademileri Tunnel[2] 456 m (1,496 ft) |
|
| Sarıyer | 18.1 | 11.2 | K9
|
Levent 1 Connector- Levent, Etiler and Baltalimanı | East bound entrance and west bound exit only |
| Sarıyer | 18.8 | 11.7 | K10
|
Cengiz Topel Cd. | |
| Sarıyer | 19.2 | 11.9 | 
|
Fatih Sultan Mehmet Bridge Toll Plaza Electronic toll payment only. |
₺8.50 toll |
| Sarıyer/ Beykoz |
20.5 | 12.7 | 
|
Fatih Sultan Mehmet Bridge 1,510 m (4,950 ft) |
|
| Beykoz | 23.6 | 14.7 | K7
|
Yeni Riva Yolu- Beykoz, Çayağzı, Riva and Anadoluhisarı | |
| Ümraniye | 28.6 | 17.8 | K8
|
O-2/O7 Connector-
|
|
| Ümraniye | 30.9 | 19.2 | K9
|
-Üsküdar, Çekmeköy, Sarıgazi, Sultanbeyli and Şile
|
|
| Ataşehir | 34.7 | 21.6 | K10 |
 -Üsküdar, Kocaeli, Ankara
|
|
| Kadıköy | 36.2 | 22.5 |
|
Halk Cd. | |
| Kadıköy | 37.7 | 23.4 | K11 
|
D.100-Üsküdar, Kocaeli, Ankara
|
