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.
Pushpalal (Mid Hill) Highway
Pushpalal (Mid-Hill) Highway (NH-18) () is an ongoing road project in Nepal, which is thought to be long.After completion,it will be the longest national highway of Nepal. Nepal has three geographical regions from east to west, plain land or Terai in south, higher mountains or Himalayas in north and hills in middle region. The highway runs through the mid-hills region only. It starts from easternmost hill at Chiyabhanjyang of Panchthar District (Province No. 1) and ends at westernmost hill at Jhulaghat of Baitadi District in far west (Province No. 7).