Otoyol 20 (), O-20, Ankara ÃÂevre yolu (), 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 in the south to Ankara-Adana Motorway.
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.