Template: Infobox trunk road / Maintenance / TR -O
Il ( provinces ):
The otoyol Highway 20 ( Turkish Ankara Çevre Otoyolu, short O -20) is the motorway the Turkish city of Ankara. Three kilometers of highway are expanded to three lanes on both sides, and the remaining 107 km on both sides of four lanes. The built 1993 to 1997 beltway is in communication with the O -4 to Istanbul, a further connection with the O -21 to Adana is planned.