South Korea has seven highway systems.
National Expressways () or Expressways ()
General National highways () or National highways ()
Special Metropolitan City roads and Metropolitan City roads ()
Special Metropolitan City roads () are the highway in the special city (Seoul).
Metropolitan City roads () are the highway in the metropolitan city.
Local highways ()
State-funded local highways (, shortly )
General local highways (
Si roads () are the highways in the cities (Si).
Gun roads () are the highways in the counties (Gun).
Gu roads () are the highways in the districts (Gu).