List of National Highways in India by highway number

• All north-south oriented highways will have even numbers increasing from the east to the west
• All east-west oriented highways will have odd numbers increasing from the north to the south
• All major Highways will be single digit or double digit in number
• Three-digit numbered highways are secondary routes or branches of a main highway. The secondary route number is prefixed to the number of the main highway. For example, 144, 244, 344 etc. will be the branches of the main NH44
• Suffixes A, B, C, D etc. are added to the three-digit sub highways to indicate very small spin-offs or stretches of sub-highways

  List of National Highways