Turkey

Area code 90Common abbreviation TRLast updated 22-2-2008
Road classSyntax explanationAdministrative subordinationSub classesZonesSystemRemarks
European roadE[0-9]<2-3>EuropeSee Europe
Motorway (Otoyol)O.[0-9]<1-2>national1-d NorthwestExit numbers: sequential
2[0-9] Centre
3[0-9] West
5[0-9] Southeast
National road (Devlet yol)D.[0-9]<3>national[1-9][05]0Grid
other [0-9]<2>[05]
other numbers
Provincial road (Il yol)[0-9]<2>-[0-9]<2>national-provincial
General description:
Although only a small part of Turkey is in Europe, European roads are defined and signposted throughout the whole country.
Motorway numbers have 1 or 2 digits. Zones are determined by the first digit. 1-digit numbers form one zone, which could be called zone 0 (but this zero is not used in the actual numbers). Numbering is sequential per zone: if number xy exists, then number x(y-1) also exists (y>0)
Exit numbering is interesting: Spurs from a numbered motorway have exit numbers derived from the number of the exit where they are joined to the main road, by adding a digit at the end. For example, a spur between the O.2 and D100 starting at exit 17 has exits 171, 172 and 173. This implies that exit numbers are not unique, there are e.g. two exits 12 along the O.4 (one derived from exit 1, the other just sequential between 11 and 13), but they are unique when restricted to the main road.
Devlet yollari: East-west routes have numbers under 500, increasing in southbound direction. North-south routes have numbers over 500, increasing in eastbound direction.
The most important east-west routes have numbers ending in 00, the next most important ones have other numbers ending in 0. All are even. Numbers north of the main D100 Edirne-Istanbul-Erzurum-Iran begin with 0.
The most important north-south routes have numbers ending in 50, all others are odd, the more important ones ending in 5.
Il yollari: Provincal roads have 4-digit numbers, with a dash separating the first two from the others. The first two digits are the provincial code, which can begin with 0. The following provincial codes are in use:
01Adana39Kirklareli
02Adiyaman40Kirsehir
03Afyon41Kocaeli
04Agri42Konya
05Amasya43Kutahya
06Ankara44Malatya
07Antalya45Manisa
08Artvin46Kahraman Maras
09Aydin47Mardin
10Balikesir48Mugla
11Bilecik49Mus
12Bingol50Nevsehir
13Bitlis51Nigde
14Bolu52Ordu
15Burdur53Rize
16Bursa54Sakarya
17Canakkale55Samsun
18Cankiri56Siirt
19Corum57Sinop
20Denizli58Sivas
21Diyarbakir59Tekirdag
22Edirne60Tokat
23Elazig61Trabzon
24Erzincan62Tunceli
25Erzurum63Sanli Urfa
26Eskisehir64Usak
27Gazi Antep65Van
28Giresun66Yozgat
29Gumushane67Zonguldak
30Hakkari68Aksaray
31Hatay69Bayburt
32Isparta70Karaman
33Icel71Kirikkale
34Istanbul72Batman
35Izmir73Sirnak
36Kars74Bartin
37Kastamonu75Ardahan
38Kayseri76Igdir
Road signs: Green with white text on motorways, blue with white text on main roads, white with black text for local destinations and brown with white text for tourist destinations. Instead of a dot, a dash is sometimes written after the D or O.
History: The current road numbering system was introduced around 1990. The old system had 1- and 2-digit numbers.
Motorway numbers were changed again in 1995 (to the current system). Previous motorway numbers were sequential with two digits, beginning with 01.
Sources: various maps and atlases

    Official sites:
  1. General Directorate of Highways
    Other links:
  2. Turkish Road Association
  3. Ehliyet road signs
    Other pages within this site:
  4. Europe

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