Otoyol 31

O-31
İzmir-Aydın Otoyolu
Route information
Part of E87
Length	127.8 km (79.4 mi)
Existed	1996[1]–present
Major junctions
North end	O-30 in Buca, İzmir
Major intersections	D.550 in Menderes D.550 in Belevi D.525 in Germencik D.550 in Aydın
South end	D.320 in Aydın
Location
Country	Turkey
Regions	Aegean
Provinces	İzmir, Aydın
Major cities	İzmir, Aydın
Highway system
Highways in Turkey Motorways List State Highways List
← O-30 → O-32

Otoyol 31, named the İzmir-Aydın Motorway (Turkish: İzmir-Aydın Otoyolu) or just the Aydın Motorway and abbreviated as the O-31 is a 127.8 km (79.4 mi) long toll motorway in western Turkey. Beginning at an intersection with İzmir Beltway, the O-31 runs south from İzmir to Aydın and parallels the D550 for most of its route.

Plans to extend the O-31 further to Denizli and Burdur have been finalized and the tender is expected to be awarded on 18 September 2018.^[2]

The O-31 begins at Işıkkent interchange, a trumpet interchange with the İzmir Beltway (O-30) in southeast Buca, İzmir, outside the urban city zone.^[3] From there, the route heads south through the recently closed Işıkkent Toll Plaza until reaching the Lesser Menderes Plain. The motorway crosses over the D.550, which is accessible via Exit K1. Exit K1, named Havalimanı, also provides access to Adnan Menderes Airport, via the D.550.^[3]

Following Exit K1 the O-31 becomes a toll motorway after passing through Pancar Toll Plaza, which uses automated vehicle classification to recognize different types of vehicles and price them accordingly.

The next and first tolled exit on the motorway is Exit K2, named Torbalı, which is the Torbalı connector. The 4 km (2.5 mi) long Torbalı connector links the O-31 to the D.550 just north of Torbalı. Following Exit K2, the motorway continues south bypassing Torbalı on the west. Near the village of Sağlık, is the Sağlık Rest Area, which consist of restaurants and a gas station.^[3] Exit K3, named Belevi, is the last exit within the İzmir province. This exit connects to the D.550 to Selçuk as well as the coastal city of Kuşadası.^[3]

After Exit K3, the O-31 passes over the 559 m (1,834 ft) long Belevi viaduct and then enters the 3,048 m (10,000 ft) long 75th Anniversary Selatin Tunnel (Turkish: 75. Yıl Selatin Tüneli), passing through the Aydın Mountains and into Aydın Province.

After exiting the tunnel, the Selatin Rest Area is available for northbound drivers. The motorway descends into the Greater Menderes Plain and turns east. After passing over the Kızılcapınar viaducts, Exit K4, named Germencik, connects to the D.525 to Söke, as well as the D.550 to Germencik. Following the exit, the Germencik Rest Area is available to southbound drivers. After passing over the İkizdere Creek, the tolled section ends at the Aydın Toll Plaza.^[3]

Right after the toll plaza is Exit K5, named Aydın North, with the D.550 in west Aydın. The O-31 becomes the Aydın Beltway and runs around the south of the city. The next exit is Exit K6 with the D.550, which heads south to Muğla. Up until 2016, this was the end of the motorway. Following Exit K6, is the incomplete Exit K7. Exit K7 is where the motorway will continue east to Denizli and Burdur, but for now the O-31 branches off its future route to Denizli and continues as the Aydın Beltway. The next exit, Exit K71, connects to Mehmet Ali Tosun Boulevard and the Aydın Airport. The route then curves north and ends at an intersection with the D.320 in east Aydın.^[3]

Province	District	km	mi	Exit	Destinations	Notes
İzmir	Buca	0.0	0.0	K7	O-30 (İzmir Beltway) – Balçova, Bornova, Menemen	Trumpet interchange
	Menderes	11.4	7.1	K1	D.550 – Adnan Menderes Airport, Gaziemir
		15.3	9.5	Pancar Toll Plaza
	Torbalı	20.5	12.7	K2	Torbalı connector — Torbalı	Feeder to D.550
	Selçuk	34.5	21.4	K3	D.550 – Selçuk
İzmir–Aydın line	Tire–Germencik line	41.3	25.7	75th Anniversary Selatin Tunnel
Aydın	Germencik	56.1	34.9	K4	D.525 – Söke D.550 – Germencik
	Aydın	88	55	Aydın Toll Plaza
		90	56	K5	D.550 – Aydın, İncirliova	Western end of the Aydın Beltway
		95.9	59.6	K6	D.550 – Çine, Muğla
		97.1	60.3	K7	O-31 – Denizli, Burdur	Future route of the O-31; tender expected to be awarded on 18 September 2018
		101	63	K71	Mehmet Ali Tosun Boulevard — Aydın Airport
		105	65	K72	D.320 – Nazilli, Denizli	Eastern end of the Aydın Beltway
1.000 mi = 1.609 km; 1.000 km = 0.621 mi        Tolled       Unopened

• List of highways in Turkey

• Media related to Otoyol 31 at Wikimedia Commons