Roads and expressways in South Korea
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Expressways in South Korea were recently renumbered; originally they were numbered in order of construction. As of August 24th, 2001, they are numbered in a scheme somewhat similar to that of the Interstate Highway System in the United States:
- Arterial routes have two digit route numbers, with north-south routes having odd numbers, and east-west routes having even numbers. Primary routes have five and zero as their last digits respectively, while lesser routes have last digits other than five and zero.
- Branch routes have three digit route numbers, where the first two digits match that the route number of an arterial route.
- Belt lines have three digit route numbers where the first digit matches the respective city's postal code.
- Route number range 70-99 are reserved in the event of Korean reunification.
- The Gyeongbu Expressway kept the route 1 moniker, as it is South Korea's first and most important expressway.
- Expressway No 1
- Expressway No 10
- Expressway No 12
- Expressway No 15
- Expressway No 16
- Expressway No 25
- Expressway No 35
- Expressway No 37
- Expressway No 40
- Expressway No 45
- Expressway No 50
- Expressway No 55: the Jungang and Daegu-Busan expressways.
- Expressway No 65
- Expressway No 66
- Expressway No 100 - Seoul Ring Expressway
- Expressway No 104
- Expressway No 110
- Expressway No 120
- Expressway No 130
- Expressway No 251
- Expressway No 300
- Expressway No 451
- Expressway No 551
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