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Otoyol 4

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O-4 shield}}
O-4
Anadolu Otoyolu
MotorwayO-4.JPG
Route information
Part of E80 E89
Part of AH1
Length372 km (231 mi)
Existed1984–present
Major junctions
West end O-1, in Istanbul
Major intersections
East end O-20 in Ankara
Location
CountryTurkey
RegionsMarmara, Black Sea, Central Anatolia
ProvincesIstanbul, Kocaeli, Sakarya, Düzce, Bolu, Ankara
Major citiesIstanbul, Izmit, Bolu, Ankara
Highway system
← O-3→ O-5
Çamlıca Toll plaza on the east end of Otoyol 4 in Istanbul.
Kızılcahamam Toll plaza on the O-4

Otoyol 4 (English: Motorway 4), named Anatolian Motorway (Turkish: Anadolu Otoyolu) and abbreviated as O-4, is a toll motorway connecting the northwestern Marmara Region to the Central Anatolia Region in Turkey. It runs parallel to the D.100 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 the heavily urbanized northeastern shore of the Sea of Marmara 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 is the longest completed motorway in Turkey spanning 379 km (235 mi), just 14 km (8.7 mi) longer than the O-52. The partially-opened O-5 is expected to surpass the length of the O-4, when it is completed in 2019, with a total length of 407 km (253 mi). Construction of the O-4 began in 1984 and was widely completed in 1992 except for a short gap through the mountains west of Bolu. This gap was connected in 2006, with the opening of the Mount Bolu Tunnel.

Route description

Istanbul

The O-4 begins at the intersection with the O-1. The next interchange is in northern Ataşehir with the O-2 .[1] After the motorway crosses Necip Fazıl Boulevard, the last toll-free exit in Istanbul (K1), the O-4 becomes a toll-motorway at the Çamlıca toll booths. The first tolled exit is exit K2, which is the Samandıra-Kartal connector, that is the first of several connections to the D.100.[2] Exit K3 connects to Fatih Boulevard in Sultanbeyi.[3] The interchange with the O-7 is located just as the O-4 enters the district of Pendik. Exit K4 is located right on the eastern border of the Pendik district and connects to the Sabiha Gökçen Airport.[4] After exit K4, the O-4 enters the last district in Istanbul, Tuzla. Exit K5 (Orhanlı junction) also offers a connection to the Sabiha Gökçen airport as well as the Kurtköy-Pendik connector.[5] The O-4 continues through northern Tuzla, passing through mostly industrial parks until leaving the Istanbul Province and entering the Kocaeli Province.

Kocaeli

After crossing into Kocaeli, exit K6 is the Şekerpınar-Çayırova connector in Şekerpınar.[6] The O-4 traverses through northern Gebze until exit K7, which is a direct connection to the D-100.[7] After crossing over the D-100, the O-4 interchanges with the northern end of the O-5 at the unnumbered Mualimköy junction.[8] Following the junction, the motorway runs along the heavily industrialized northern shore of the Izmit Bay with exits at Diliskelisi (K8)[9] and Hereke (K9, K10).[10][11] Between Hereke and Körfez the motorway runs directly next to the D-100 and the Istanbul-Ankara railway along the shoreline until the motorway enters Körfez. Once in the city, Exit K11 connects to the D.100.[12] Shortly after K11, an unmarked exit to a KGM employee housing facility.[13] The exit is not open to public traffic although cars may use the overpass to make a U-turn. After passing a service area, the O-4 enters the city of İzmit. Exit K12 connects to the D.100 but only for traffic from/to Istanbul. The route then heads north and travels around the hilly northern perimeter of the city, passing through two tunnels and a viaduct. The O-4 crosses over the D.605, which can be accessed via Exit K12.[14] After bypassing Izmit, the motorway heads southeast, crossing over the D.100 (Exit K13[15]) in Bahçelievler. After the exit, the route enters Sakarya Province.

Sakarya

Otoyol 4 parallels the Istanbul-Ankara railway along the southern shore of Lake Sapanca except for its short bypass around the town of Sapanca. Exit K14 connects to the town, via İzmit Avenue.[16]

Exit List

Province District km mi Exit Destination Notes
Istanbul Ümraniye/Ataşehir 0 0 K10 O-2 — FSM Bridge, Mahmutbey / P.34-12 — Çamlıca Connector to O-1
3.3 2.1 K1 Necip Fazıl Blvd.
Samandıra Toll Plaza
Sancaktepe 7.9 4.9 K2 Kartal connector — Kartal Connector to D.100
Sultanbeyli 12.6 7.8 K3 Fatih Blvd. — Sultanbeyli
Pendik 17.7 11 K81 O-7 — YSS Bridge, Istanbul New Airport
20 12.4 K4 Pendik connector — Pendik Connector to D.100
Tuzla 21.6 13.4 K5 Airport connector — S. Gökçen Airport
Kocaeli Çayırova 29.6 18.4 K6 Çayırova connector — Çayırova Connector to D.100
31.4 19.5 K6-1 Muhsin Yazıcıoğlu Ave. — Gebze OSB
Gebze 39.8 24.7 K7 D.100 — Gebze
42.2 26.2 K1 O-5 — Osman Gazi Bridge, Bursa Bursa-Kemalpaşa section under construction
Diliskelesi 46 28.6 K8 Liman Ave. — Diliskelesi
Körfez 52.1 32.3 K9 D.100 — Hereke Eastbound exit, westbound entrance
54.5 33.7 K10 D.100 — Hereke Eastbound entrance, westbound exit
67.9 42.2 K11 D.100 — Körfez
Derince 75.1 46.7 K12 D.100 — İzmit Eastbound exit, westbound entrance
İzmit
Korutepe Tunnel
Gültepe Tunnel
86.8 53.9 K13 D.605 — İzmit, Kandıra
Kartepe 94.2 58.5 K14 D.100 — İzmit
Sakarya Sapanca 101.5 63.1 K15 P.54-52 — Sapanca
Arifiye 114.1 70.9 K16 D.650 — Arifiye, Sakarya
Akyazı 130.8 81.3 K17 D.140 — Akyazı
Hendek 137.4 85.4 K18 Hendek connector — Hendek Connector to D.100
Düzce Düzce Merkez 169 105 K19 D.100 — Düzce
189.8 117.9 K20 D.100 — Kaynaşlı
Bolu Bolu Merkez
Mount Bolu Tunnel
200.9 124.8 K21 P.14-50 — Abant
207.9 129.2 K22 D.100 — Bolu Bolu west
227.1 141.1 K23 D.100 — Bolu Bolu east
Yeniçağa 249.6 155.1 K24 D.100 — Yeniçağa
Gerede 259.5 161.2 K25 P.14-05 — Dörtdivan
266.2 165.4 K26 Gerede connector — Gerede / D.100 — Karabük
Ankara Çamlıdere 311.1 193.3 K27 P.06-86 — Çamlıdere
Kızılcahamam 326.9 203.1 K28 P.06-82 — Kızılcahamam, Güdül
Kazan
Kazan Toll Plaza
359.7 223.5 K29 Fevzi Çakmak Ave. — Kahramankazan
360.8 224.2 - P.06-75 — Mürted Air Base
Yenimahalle 371.7 231 K1 O-20 — Ankara Ankara Beltway
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

References

  1. ^ "Ataşehir interchange" (Map). Google Maps. Retrieved 25 July 2017.
  2. ^ "Exit K2" (Map). Google Maps. Retrieved 25 July 2017.
  3. ^ "Exit K3" (Map). Google Maps. Retrieved 25 July 2017.
  4. ^ "Exit K4" (Map). Google Maps. Retrieved 25 July 2017.
  5. ^ "Exit K5" (Map). Google Maps. Retrieved 25 July 2017.
  6. ^ "Exit K6" (Map). Google Maps. Retrieved 25 July 2017.
  7. ^ "Exit K7" (Map). Google Maps. Retrieved 25 July 2017.
  8. ^ "Mualimköy interchange" (Map). Google Maps. Retrieved 25 July 2017.
  9. ^ "Exit K8" (Map). Google Maps. Retrieved 25 July 2017.
  10. ^ "Exit K9" (Map). Google Maps. Retrieved 25 July 2017.
  11. ^ "Exit K10" (Map). Google Maps. Retrieved 25 July 2017.
  12. ^ "Exit K11" (Map). Google Maps. Retrieved 25 July 2017.
  13. ^ "KGM unmarked exit" (Map). Google Maps. Retrieved 25 July 2017.
  14. ^ "Exit K12" (Map). Google Maps. Retrieved 25 July 2017.
  15. ^ "Exit K13" (Map). Google Maps. Retrieved 25 July 2017.
  16. ^ "Exit K14" (Map). Google Maps. Retrieved 25 July 2017.
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