Otoyol 20
Otoyol 20, O-20, Ankara Çevreyolu, is a motorway in Ankara, Turkey that forms the ring road of the city. The long beltway connects in the northwest to the Anatolia Motorway, and it will connect in the south to Ankara-Adana Motorway after its completion.
The beltway is a four lane motorway in both directions on its length.
The beltway is the only ring motorway in Turkey to form a complete ring.
| Province | District | Exit No. | Name | Notes |
| Ankara | Yenimahalle | K1 | – Bolu,Izmit, Istanbul | |
| Ankara | Etimesgut | K2 | 1. TBMM Cd. | |
| Ankara | Etimesgut | K3 | – Ayaş | |
| Ankara | Etimesgut | K4 | Istasyon Cd. | |
| Ankara | Etimesgut | K5 | Ahi Mesud Blvd. | |
| Ankara | Etimesgut | K6 | – Eskişehir, Uşak, Izmir | |
| Ankara | Gölbaşı | K7 | Turgut Özal Blvd. | |
| Ankara | Gölbaşı | K8 | – Konya, Adana | |
| Ankara | Gölbaşı | K9 | -Konya, Adana | |
| Ankara | Çankaya | Karataş Viaduct | 600 m | |
| Ankara | Çankaya | K10 | Nato Yolu Cd. | |
| Ankara | Mamak | K11 | Mavi Göl Cd. | |
| Ankara | Mamak | Bayındır Dam Bridge | 400 m | |
| Ankara | Mamak | K12 | – Samsun | |
| Ankara | Mamak | Samsun Road Bridge | 400 m | |
| Ankara | Mamak | K13 | Yeşil Kuşak Cd. | |
| Ankara | Altındağ | Çubuk 1 Dam Bridge | 300 m | |
| Ankara | Keçiören | K14 | -Esenboğa International Airport | |
| Ankara | Keçiören | K15 | Bağlum Blvd. | |
| Ankara | Keçiören | K16 | Yozgat Blvd. | |
| Ankara | Yenimahalle | K17 | Anadolu Blvd. | |
| Ankara | Yenimahalle | K18 | Batıkent Yolu | |
| Ankara | Yenimahalle | K19 | -Bolu,Sakarya,İstanbul |