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 Guodao, or China National Highways. These roads often exist to liaise between different centres.
- S routes stand for Shengdao, or provincial roads.
- X routes stand for Xiandao, or county-level roads.
- A rank below them are the xiangdao, or township-level roads.
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 and express routes are not given any specific numbering at the moment. One possibility, however, has been to label them 0-series G routes (e.g. G020 would be the Jingjintang Expressway).
Express routes are numbered in a similar manner.