Pan-American Highway
The Pan-American Highway is a network of roads stretching across the American continents and measuring about in total length. Except for a rainforest break of approximately , called the Darién Gap, the roads link almost all of the Pacific coastal countries of the Americas in a connected highway system. According to "Guinness World Records", the Pan-American Highway is the world's longest "motorable road". However, because of the Darién Gap, it is not possible to cross between South America and Central America with conventional highway vehicles. Without an all-terrain vehicle, it is necessary to circumnavigate this terrestrial stretch by sea.
China National Highway 318
China National Highway 318 (G318) runs from Shanghai to Zhangmu on the China-Nepal border. It is the longest China National Highway at in length and runs west from Shanghai towards Zhejiang, Anhui, Hubei, Chongqing, Sichuan, and ends in Tibet Autonomous Region. From Lhasa to Zhangmu it is also called Friendship Highway.
At the Sino-Nepal Friendship Bridge, it connects with the 115 km long Araniko Highway
to Kathmandu.