Longest Highway In India:
A major part of NH 7 covers the North-South Corridor of NHDP and it is officially listed as running over 2,369 km (1,472 mi) from Varanasi to Kanyakumari. It is the longest national highway in India.
Smallest national highway in India:
National Highway 47A, which starts from NH 47 at Kundannur, is the shortest highway in India.
It has a length of 6 Kilometeres in total.
It links the man-made isle of Willingdon Island with Kochi bye-pass.