China road numbering
Roads in the People's Republic of China are numbered G, S or X, and four different categories (not including expressways and express routes) exist:
Non-expressways and non-express routes
- G routes stand for guódào (国道), or China National Highways. These roads often exist to liaise between different centres.
- S routes stand for shěngdào (省道), or provincial-level roads (e.g. S205 of Beijing and S303 of Inner Mongolia, none of Beijing or Inner Mongolia is a province).
- X routes stand for xiàndào (县道), or county-level roads.
- Y routes stand for xiāngdào (乡道), or township-level roads and C routes stand for cūndào (村道), or village-level roads . Those roads are seldom marked with Y or C on maps, instead, Chinese characters are used; one can see Y and C marking almost exclusively on kilometer markers.
G, S, and X roads often become city roads as of the delimitation of the city. At the city border, control of the road switches from the gonglu side (public road administration) to the shizheng side (city government).
Expressways and express routes
Expressways of China use a new numbering. The labelling of the former three digit 0-series G routes (e.g. G020) was replaced by a system that uses one digit for expressways starting in Beijing (e.g. G5), two digits for long-distance expressways (e.g. G30) and four digits for regional and local expressways (e.g. G9411).