Otoyol 51

O-51
Adana-Erdemli Motorway Adana-Erdemli Otoyolu
Route information
Part of E90 / E982 / AH84
Length	82.3 km (51.1 mi)
Existed	1992–present
Major junctions
From	O-52 in Seyhan, Adana O-21 in Tarsus, Mersin D.750 in Tarsus, Mersin
Major intersections	O-21 in Tarsus, Mersin D.750 in Tarsus, Mersin
To	D.400 in Erdemli, Mersin
Location
Country	Turkey
Regions	Mediterranean
Provinces	Adana, Mersin
Major cities	Adana, Tarsus, Mersin
Highway system
Highways in Turkey Motorways List State Highways List
← O-33 → O-52

Otoyol 51 (English: Motorway 51), abbreviated as O-51, aka Adana-Erdemli Otoyolu (English: Adana-Erdemli Motorway), is a toll motorway in the Mediterranean Region of Turkey, connecting the cities Adana and Mersin. The motorway is on its full length of 99 km (62 mi) part of international routes as of European routes E90 and E982 and Asian Highway 84.

The motorway starts from the western terminus of O-52 in Central Adana, runs westward reaching the south terminus of Pozantı-Adana Motorway O-21 northeast of Tarsus, continues southwest to Mersin bypassing it at north and terminates in Erdemli.

There are plans to extend the motorway to Silifke.