The
expressway network of China is an integrated system of national and provincial-level
expressways in
China. It is the world's largest expressway system by length, having surpassed the overall length of the American
Interstate Highway System in 2011. Between the end of 2014 and 2015, the total length of the network grew from to meaning of expressway were built in 2015 alone. A system of national-level expressways, officially known as the
National Trunk Highway System and abbreviated
NTHS, with 7 radial expressways (from the capital
Beijing), 9 north-south expressways and 18 east-west expressways, forms the backbone of the expressway network in the country. This backbone is known as the
7918 network . In addition, the
provincial-level divisions of China each have their own expressway systems.