Otoyol 4

O-4
Otoyol 4
Anadolu Otoyolu
Route information
Part of
Length:	372 km (231 mi)
Existed:	1984 – present
Major junctions
From:	Istanbul
To:	Ankara
Location
Regions:	Marmara, Black Sea, Central Anatolia
Provinces:	Istanbul, Kocaeli, Sakarya, Düzce, Bolu, Ankara
Major cities:	Istanbul, Izmit, Bolu, Ankara
Highway system
Highways in Turkey Motorways State roads

Çamlıca Toll plaza on the east end of Otoyol 4 in Istanbul.

Otoyol 4 (English: Motorway 4), also known as Anadolu Otoyolu (English: Anatolia Motorway) and abbreviated as O-4, is a toll motorway connecting the northeastern Marmara Region to the Central Anatolia Region in Turkey. It runs parallel to the D100 for more than half of its length and then parallels the D750 for most of the eastern half. The O-4 is a major expressway in Turkey as it connects eastern Istanbul and its surrounding metropolis to the nation's capital, Ankara. The O-4 also makes up part of the International E-road network E80 and E89 as well as the AH-1 of the Asian Highway Network.

The O-4 was constructed between 1984 and 1992, with the first portion opened from Gebze to Izmit in 1984.

Route list

Province	km		Exit No.	Destinations	Notes
Istanbul	0	0	K9	Anadolu Otoyolu	Feeders to and
				Çamlıca Toll plaza
	3.3	3.3	K1	IMES (Also serves to Küçükbakkalköy and Dudullu)
				Parking area
	4.6	7.9	K2	Samandıra (Also serves to Sarıgazi, Sultanbeyli, Yakacık, Soğanlık and Kartal)	Feeder to
	12.1	20.0	K3	Kurtköy 1 (Also serves to Sultanbeyli, Pendik and Orhanlı)	Sabiha Gökçen Int'l Airport Feeder to
				Service area Viaport Shopping Center
	1.6	21.6	K4	Otoyol Havaalanı (Also serves to Orhanlı and Kurtköy)	Sabiha Gökçen Int'l Airport
Kocaeli	8.0	29.6	K5	Şekerpınar 1 (Also serves to Orhanlı, Çayırova and Tuzla)	Feeder to
				Parking area
	10.2	39.8	K6	Gebze East	Feeder to
	6.2	46.0	K7	Diliskelesi	Feeder to
				Diliskelesi Tunnel
				Parking area (westbound only)
	6.1	52.1	K8	Hereke West 1	Feeder to
				Hereke Tunnel
	2.4	54.5	K9	Hereke East 1	Feeder to
				Viaduct Çenedere
	13.4	67.9	K10	Körfez 1 (Also serves to Derince)	Feeder to
				Service area
	7.2	75.1	K11	İzmit West 1 (Also serves to Yalova and Bursa)	Feeder to
				Viaduct Çamlıdere
				Viaduct Kopantepe
				Parking area (eastbound only)
				Viaduct Danış Koper
				Korutepe Tunnel
				Viaduct Mustafa İnan
				Gültepe Tunnel
				Viaduct Yenidoğan
				Parking area
	11.7	86.8	K12	Kandıra 1 (Also serves to Gölcük)	Feeder to
	7.4	94.2	K13	İzmit East 1 (Also serves to Kartepe)	Feeder to
				Service area
Sakarya	7.3	101.5	K14	Sapanca 1 (Also serves to Arifiye)
				Parking area
	12.6	114.1	K15	Adapazarı 1 (Also serves to Bilecik)
				Parking area
	16.7	130.8	K16	Akyazı 1 (Also serves to Mudurnu)
				Service area Parkshop Outlet Center
	13.6	137.4	K17	Hendek 1
				Parking area
Düzce				Viaduct Gümüşova
	31.6	169.0	K18	Düzce (Also serves to Gölyaka and Akçakoca)	Feeder to
				Bridge Küçük Melen Creek
				Service area
	20.8	189.8	K19	Kaynaşlı
				Viaduct No.1
Bolu				Viaduct No.2
				Viaduct No.3
				Viaduct No.4
			2.9 km (1.8 mi)	Mount Bolu Tunnel
	11.1	200.9	K20	Abant (Also serves to Mudurnu and Göynük)
				Viaduct Abant-1
				Viaduct Abant-2
	7.0	207.9	K21	Bolu West
				Parking area
	19.2	227.1	K22	Çaydurt (Also serves to Mengen, Devrek and Zonguldak)
				Parking area
	22.5	249.6	K23	Yeniçağa
				Service area Metro
	9.9	259.5	K24	Dörtdivan
	6.7	266.2	K25	Gerede (Also serves to Karabük and Amasya)
				Viaduct Asım Çavuşoğlu
				Service area Dorukkaya
Ankara				Parking area
	45.1	311.1	K26	Çamlıdere
				Parking area
	15.8	326.9	K27	Kızılcahamam
				Service area Moil
				Toll plaza Akıncılar
	44.8	371.7	K1	Ankara

External links

• Istanbul road map
• Ankara road map