Q. Consider the following pairs : National Cities connected Highway
HighwayCities connected
NH 4Chennai and Hyderabad
NH 6Mumbai and Kolkata
NH 15Ahmedabad and Jodhpur
Which of the above pairs is/are correctly matched? (UPSC Prelims 2014)

Answer: None
Notes: The correct answer is [D] None. All three pairs are incorrectly matched based on the National Highway (NH) network of India. It is important to note that India renumbered its national highways in 2010; however, even under the old numbering system, these pairings do not match the primary routes.Analysis of the Pairs:Summary of Major Historical NH Routes:
Old NH No.Major Cities ConnectedNew NH No. (Approx)
NH 1Delhi to Amritsar (Indo-Pak Border)NH 44
NH 2Delhi to KolkataNH 19
NH 7Varanasi to Kanyakumari (Longest Old NH)NH 44
NH 8Delhi to MumbaiNH 48
The Renumbering Logic: In the new system implemented by the Ministry of Road Transport and Highways:
  1. Even Numbers: Run East to West (increasing from North to South).
  2. Odd Numbers: Run North to South (increasing from East to West).
  3. NH 44: Is currently the longest National Highway in India, running from Srinagar to Kanyakumari.