India holds the second-largest road and highway network worldwide. The National Highways run throughout the country and connect the northern, southern, eastern and western parts with one another. The National highway authority of India maintains the highway networks.

According to the Ministry of Roads, Transport and Highways data, there are about 599 national highways in India. The highways constituted 2.04% of India's total road network. Nevertheless, they maintained about 40% of road traffic. In the sections below, get to know about the list of national highways in India.

Here is the list of national highways in India, along with the Old National Highway Number and new National Highway Number stated below:

1. National Highway 1 (NH 1)

• States/UTs: Jammu and Kashmir
• Old National Highway Number: NH 1 A and NH 1 D
• New National Highway Number: NH 1

2. National Highway 244 (NH 244)

• States/UTs: Jammu and Kashmir
• Old National Highway Number: NH 1 B
• New National Highway Number: NH 244

3. National Highway 19 (NH 19)

• States/UTs: Bihar, Haryana, Uttar Pradesh, West Bengal, Delhi
• Old National Highway Number: NH 2
• New National Highway Number: NH 19 (Part of the Golden Quadrilateral)

4. National Highway 114 (NH 114)

• States/UTs: West Bengal
• Old National Highway Number: NH 2B
• New National Highway Number: NH 114

5. National Highway 519 (NH 519)

• States/UTs: Uttar Pradesh
• Old National Highway Number: NH 2A
• New National Highway Number: NH 519

6. National Highway 60 (NH 60)

• States/UTs: Maharashtra
• Old National Highway Number: NH 3 and NH 50
• New National Highway Number: NH 60

7. National Highway 4 (NH 4)

• States/UTs: Andaman and Nicobar Island
• Old National Highway Number: NH 223
• New National Highway Number: NH 4

8. National Highway 748 (NH 748)

• States/UTs: Goa, Karnataka
• Old National Highway Number: NH 4A
• New National Highway Number: NH 748

9. National Highway 348 (NH 348)

• States/UTs: Maharashtra
• Old National Highway Number: NH 4B
• New National Highway Number: NH 348

10. National Highway 16 (NH 16)

• States/UTs: Odisha, Andhra Pradesh, Tamil Nadu, West Bengal
• Old National Highway Number: NH 5, NH 6, NH 60, NH 217
• New National Highway Number: NH 16 (Part of the Golden Quadrilateral)

11. National Highway 135 (NH 135)

• States/UTs: Madhya Pradesh and Uttar Pradesh
• Old National Highway Number: NH 7
• New National Highway Number: NH 135

12. National Highway 138 (NH 138)

• States/UTs: Tamil Nadu
• Old National Highway Number: NH 7A
• New National Highway Number: NH 138

13. National Highway 48 (NH 48)

• States/UTs: Gujarat, Karnataka, Delhi, Haryana, Maharashtra, Tamil Nadu, Rajasthan
• Old National Highway Number: NH 8
• New National Highway Number: NH 48 (Part of the Golden Quadrilateral)

14. National Highway (NH 41)

• States/UTs: Gujarat
• Old National Highway Number: NH 8A
• New National Highway Number: NH 41

* National Highway 8B and 8C are also re-numbered into NH 147 and NH 151, respectively. Both are located in Gujarat.

15. National Highway 65 (NH 65)

• States/UTs: Andhra Pradesh, Karnataka, Maharashtra and Telangana
• Old National Highway Number: NH 9
• New National Highway Number: NH 65

16. National Highway 20 (NH 20)

• States/UTs: Punjab, Himachal Pradesh
• New National Highway Number: NH 20

17. National Highway 21 (NH 21)

• States/UTs: Chandigarh, Punjab, Himachal Pradesh
• New National Highway Number: NH 21

18. National Highway 28 (NH 28)

• States/UTs: Bihar, Uttar Pradesh
• New National Highway Number: NH 28

19. National Highway 28C (NH 28C)

• States/UTs: Uttar Pradesh
• New National Highway Number: NH 28C

20. National Highway 30 (NH 30)

• States/UTs: Bihar
• New National Highway Number: NH 30

21. National Highway 37A (NH 37A)

• States/UTs: Assam
• New National Highway Number: NH 37A

22. National Highway 45 (NH 45)

• States/UTs: Tamil Nadu
• New National Highway Number: NH 45

23. National Highway 44 (NH 44)

• States/UTs: Meghalaya, Assam, Tripura
• Old National Highway Number: NH 7
• New National Highway Number: NH 44

24. National Highway 47 (NH 47)

• States/UTs: Tamil Nadu, Kerala
• Old National Highway Number: NH 8A, NH 59, NH 59A & NH 69
• New National Highway Number: NH 47

25. National Highway 52 (NH 52)

• States/UTs: Karnataka, Maharashtra, Madhya Pradesh, Rajasthan, Haryana
• Old National Highway Number: NH 17
• New National Highway Number: NH 52

On 28th April 2010, the Ministry of road and Transport and Highway came up with a new numbering system to number the national highway network. Here are the rules used to name the national highways in India. The numbering system depends on the highway's location and demographic orientation.

• For the highways stretching from North to South, even numbers are used to number them.
• Highways running from East to West, odd numbers are assigned to mark them.
• All major highways are marked with a single-digit number or two-digit number.
• A three-digit number indicates subsidiary highways. For instance, NH 144, and NH 244 are subsidiaries of National Highway 44.
• Further, the sections of subsidiary highways are denoted by suffixes like A, B, C and D.

• India has over 200 national highways, which account for a total length of 101,011 km. The cumulative length of the state highways is 1, 31,899 km.
• The milestone on the highway is colour-coded to help travellers distinguish between national highways, state highways and city highways. National highways are denoted by yellow and white colours. For marking state highways, green and white colour is used. Black and white are used to indicate city highways.
• NHAI (National Highways Authority of India) is an autonomous authority that is in charge of developing and maintaining national highways.
• India has the Golden Quadrilateral. It is a national highway network that connects India's four major cities: Delhi (North), Kolkata (East), Mumbai (West) and Chennai (South).
• NH 44 covers the entire North-South corridor and is formed by merging seven national highways: NH 1, NH 2, NH 3, NH 1A, NH 75, NH 26 and NH 7.
• The Bharatmala Pariyojana is an effective program that is launched by the Government of India to emphasise road traffic movement and mitigate the infrastructural gaps. This umbrella project focuses on the development of the National Corridor, which includes the Golden Quadrilateral. The project envisions optimising the efficiency of movements and connecting around 550 districts in the country by national highway linkages.