Otoyol 5

Otoyol 5 (English: Motorway 5), named the Gebze-Orhangazi-İzmir Motorway (Turkish: Gebze-Orhangazi-İzmir Otoyolu) and abbreviated as O-5, is a toll motorway in Turkey. Since being completed in 2019, it connects the Istanbul metropolitan area with İzmir, via Bursa and Balıkesir. The O-5 runs parallel to the D575 and the D565 for most of its length and is a major motorway in Turkey as it provides a direct connection between Istanbul and its surrounding metropolis to the country's 3rd largest (İzmir) and 4th largest (Bursa) cities, bypassing the Gulf of İzmit via the Osman Gazi Bridge. The O-5 also makes up part of the International E-road network E881.

O-5
Gebze-Orhangazi-İzmir Otoyolu
Route information
Part of E881
Length	407 km (253 mi)
Existed	2016–present
Major junctions
North end	O-4 in Gebze
Major intersections	O-22 in Bursa
South end	O-30 in İzmir
Location
Country	Turkey
Regions	Marmara, Aegean
Provinces	Kocaeli Province, Yalova Province, Bursa Province, Balıkesir Province, Manisa Province, İzmir Province
Major cities	Gebze, Bursa, Balıkesir, Akhisar, Turgutlu, İzmir
Highway system
Highways in Turkey Motorways List State Highways List
← O-4 → O-7

Otoyol 5 near Altınova exit

The western part of the Bursa Beltway, which is part of the O-5, was completed during the 2000s. The rest of the O-5 has been under construction since the early 2010s, with the first portion opened from Altinova to Gemlik in April 2016. As of April 2017, the O-5 is open in two separate sections: the 105.5 km (65.6 mi) section from its northern terminus in Gebze to Bursa, across the Osman Gazi Bridge along with a 18.2 km (11.3 mi) section from Kemalpaşa to its southern terminus in İzmir. The final section, Karacabey to Akhisar, opened on August 5, 2019.

The O-5 is the most expensive toll motorway in Turkey as the price for a personal vehicle from Gebze to Izmir 147 km (91 mi), ₺ 470 (US$ 17.39), including the Osman Gazi Bridge toll of ₺ 190.00 (US$ 7.03).