| Country: | TUR |
| Type: | otoyol |
| Route: | 50 |
| Alternate Name: | Adana Beltway Adana Çevreyolu |
| Established: | 1992 |
| Terminus A: | at Kuyumcular, Adana |
| Terminus B: | at Yıldırım Beyazıt Mah., Adana |
| Length Km: | 22.5 |
| Regions: | Mediterranean |
| Provinces: | Adana Province |
| Cities: | Adana |
Otoyol 50 (English: Motorway 50), abbreviated as O-50, aka Adana Çevreyolu (English: Adana Beltway), was the former designation for the 22km (14miles) long motorway passing through the city of Adana, Turkey. In the 2014 the KGM resigned the section of motorway west of the Seyhan River as the O-51 and the section west of the Seyhan River as O-52. Thus extending the O-52 and O-51 into central Adana.
It started in the west of Adana at eastern terminus of Adana-Erdemli Motorway O-51, running north of the city, and ending northeast of Adana connecting to Adana-Şanlıurfa Motorway O-52. O-50 had a full length of 23km (14miles). It was also a part of the European route E90 and the international Asian Highway 84. The Adana Beltway is still a toll-free motorway.