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India has one of the largest road networks in the world, and the national highways form the backbone of this system. The Government of India, along with the National Highways Authority of India (NHAI) and the Ministry of Road Transport and Highways (MoRTH), has developed an extensive network of expressways, national highways, state highways, and district roads. As of March 2023, India has a total of 145,240 kilometres of national highways, connecting major cities, industrial hubs, ports, and remote regions across the country.

Introduction to National Highways in India

The Indian national highway network connects almost every part of the country, improving trade, tourism, and connectivity. The highways reduce traffic congestion, cut down travel time, and support smooth transportation of goods and passengers. The Ministry of Road Transport and Highways (MoRTH) is responsible for planning, developing, and maintaining these roads, while the National Highways Authority of India (NHAI) handles implementation and management.

Each state and union territory regularly submits proposals to MoRTH for new national highway projects based on connectivity needs, regional development, and available funds.

History and Development of National Highways

The development of roads in India began during the British period, mainly for military use. However, after independence in 1947, the Indian government started focusing on building highways for economic growth and national integration. The first national highway in India was built in the 1950s, and to manage the expansion of road infrastructure, the government introduced the National Highways Act, 1956.

This act empowered the central government to declare certain roads as national highways and take charge of their construction and maintenance. Over the decades, India’s highway system expanded rapidly. Today, it includes major corridors, expressways, feeder routes, and rural connectors that link every major state and city.

Funding for National Highways

The development of national highways in India is funded through the Central Road Fund (CRF), established under the Central Road Fund Act, 2000. This dedicated fund is collected through a cess on petrol and diesel, currently set at ₹2.00 per litre.

The allocation of the Central Road Fund is shown below:

This structured funding ensures regular maintenance, expansion, and modernization of the national highway system.

Classification of Indian Highways

India’s national highway network is classified into different categories based on purpose, connectivity, and design. Understanding these categories helps in identifying the importance and function of each type of highway.

Numbering System of National Highways

The numbering system of national highways was revised to make it more logical and easy to understand. Highways are numbered based on their direction and location.

1. North–South Corridors
   Highways running vertically from north to south are given odd numbers.

   • Example: National Highway 44, which connects Srinagar to Kanyakumari, covers about 4,000 km, making it the longest highway in India.

2. East–West Corridors
   Highways running horizontally from east to west are assigned even numbers.

   • Example: NH 27, connecting Porbandar in Gujarat to Silchar in Assam, stretches over 3,300 km.

3. Golden Quadrilateral
   The Golden Quadrilateral project connects four major metro cities — Delhi, Mumbai, Chennai, and Kolkata.
   It forms the backbone of India’s highway network and covers 5,846 km through:

   • NH 44: Srinagar to Kanyakumari

   • NH 19: Agra to Kolkata

   • NH 48: Delhi–Mumbai–Chennai

   • NH 16: Kolkata to Chennai

4. Three-Digit Highways and Sub-Routes
   Highways with three digits are branches of main highways, often marked with letters such as A, B, C, or D.

   • Example: NH 144 and NH 244 are branches of NH 44.

Importance of National Highways

National highways are vital for the economic and social development of India. They connect cities, towns, industrial regions, ports, and borders. These highways reduce travel time, improve logistics, promote trade, and support tourism.

Key benefits of national highways include:

• Faster movement of goods and passengers

• Reduction in vehicle operating and maintenance costs

• Better connectivity for remote and rural regions

• Enhanced inter-state trade and tourism

• Support for industrial growth and urban expansion

The development of expressways and multi-lane highways has significantly improved travel safety and efficiency.

State-Wise List of National Highways in India

India has a total of 599 national highways (as of 2023). The length and distribution vary from state to state, depending on geographical size and connectivity requirements. Below are a few examples of major states and their national highway coverage.

Smaller states and union territories such as Goa, Delhi, and Chandigarh have fewer kilometres of national highways due to their smaller geographical area.

Growth and Modernisation of Indian Highways

In recent years, the Indian government has launched major programs like Bharatmala Pariyojana and Sagarmala Project to modernize and expand the road network. These initiatives focus on improving connectivity to ports, economic zones, border areas, and rural regions.

Smart highway technologies, including digital tolling, real-time traffic monitoring, and improved safety measures, are being implemented across key corridors. Several expressways like the Delhi–Mumbai Expressway and Ganga Expressway are setting new benchmarks in modern road infrastructure.

Conclusion - National Highways in India

The national highway network of India is the lifeline of the nation’s transport system. From the first few roads built during the British era to the massive 145,240 km network of today, highways have transformed the way India connects and grows.

With continued efforts from the Government of India, NHAI, and MoRTH, new projects are being added every year to ensure faster connectivity, smoother travel, and balanced regional development. The national highways of India not only link cities but also drive the economy, making them one of the most valuable assets of the country.