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.
List of National Highways in India (Old numbering)
The longest National Highway is the NH 7 which is from Varanasi to Kanyakumari passing through Uttar Pradesh, Madhya Pradesh, Maharashtra, Telangana, Andhra Pradesh, Karnataka and Tamil Nadu covering a distance of , as of Sep 2011 as per National Highways Authority of India . The shortest National Highway is the NH 47A (), which connects Kundanoor Junction of maradu in Kochi city to the Kochi port at Willingdon Island. India has the distinction of having the world’s highest drivable highway connecting Manali to Leh in Ladakh, Kashmir.