Despite the "National Highway" designation, G209 is not of uniform quality throughout its length.[1] For example, as of 2009, the 20-kilometer section north of Badong is nothing but a very poor dirt road. Nonetheless, even that section is of importance for the national highway system: it is used e.g. by long-distance buses plying the route between Badong and points east. Many parts of the Muyu to Hongping section (in Hubei's Shennongjia Forestry District) are not much better. On the other hand, the section from the Shennongjia National Park entry to Muyu to Baishahe Village (in Nanyang Town, Xingshan County) is part of a recently upgraded Yichang-Shennongjia Highway.
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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