It heads northwest from Beijing to Zhangjiakou then heads straight west, and runs to approximately 1,100 kilometers (680 mi).
In October 2004 and November 2004, it was overwhelmed with traffic diverted from the Jingzhang Expressway, occurring as a result of a massive traffic jam on the expressway. In a related incident in August 2010, a 100-km traffic jam occurred on this route.[1]
Slow moving traffic and recurrent traffic jams on Highway 110 between Beijing and Inner Mongolia result from an overload of coal trucks transporting coal from newly opened mines in Inner Mongolia to sea ports on the coast of China.
China National Highway 112 runs around Beijing
Before 2013, Mainland China observed National Highway 228 as Taiwan Ring, composed of several National Expressway (Republic of China) and Taiwan provincial highways, this designation is not recognized by Republic of China (Taiwan). This observation was eventually dropped in new National Highway plans, replaced by Dandong-Dongxing Highway.
A extension plan of the highway system was announced in 2013, including extension of existing highways(101-112, 201-227, 301-330) and new highways (North-South 228-248, East-West 331-361, Connections 501-581). Only small portions of them needs to be constructed from scratch; most of the new highways would be upgraded provincial/county highways.
Another extension plan was announced in 2022, including new small purpose connection highways (601-701).
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