India’s National Highway Network

1.1 How fast has India’s highway network actually grown?

India’s national highway network reached 146,204 km by 2025, up from about 91,000 km in 2014.

• That’s roughly 60% growth in a single decade.
• India now runs the world’s second-largest highway network, behind only the United States.
• The National Highways Authority of India (NHAI) builds and maintains it, under the Ministry of Road Transport and Highways.
• The historic Sher Shah Suri Marg, between Delhi and Amritsar, is designated National Highway No. 1.

1.2 If highways carry most of the traffic, why is their share of total road length so small?

National highways are a central government asset. Most of India’s road length is state, district, and rural roads instead.

• National highways form only a small percentage of India’s total road network by length.
• Yet they carry the majority of the country’s road-based freight and passenger traffic.
• They connect state capitals, major ports, and border crossings with neighbouring countries.

2.1 Why does NH44 get an even number, and NH27 an odd one?

In 2010, the government gave every national highway a number based on two simple rules.

• A highway running North to South gets an even number, like NH44 or NH8.
• A highway running East to West gets an odd number, like NH27 or NH19.
• Even numbers get bigger as you move from east to west across the map.
• Odd numbers get bigger as you move from north to south down the map.
• NH44 runs the whole way from Kashmir to Kanyakumari. It is India’s longest national highway.
• So a highway’s number is a clue to its rough location, not just its direction. A low even number sits in the east. A high even number sits in the west.

2.2 What do three-digit highway numbers and letters like “A” mean?

• One or two-digit numbers, like NH44 or NH27, mark the main, big highways.
• Three-digit numbers mark smaller branch roads that split off from a main highway.
• A branch road’s number often hides its main highway’s number inside it. NH344 branches off NH44.
• A letter after a number, like NH344A, marks just a short extra stretch of that branch road.

2.3 Can you read a full highway number in one go? Try NH548A.

Break any highway number into three parts: the main road, the branch, and the spur.

• NH48 is a main highway. It runs north-south, linking Delhi and Mumbai.
• NH548 has three digits, and ends in “48”. That tells you it is a branch road off NH48.
• NH548A adds a letter. That marks a short spur off the NH548 branch.
• So NH548A is a small spur, off a branch, off the main Delhi-Mumbai highway. Each part of the number is a real clue.

3.1 What exactly does the Golden Quadrilateral connect, and when was it built?

The Golden Quadrilateral is 5,846 km long. It links Delhi, Mumbai, Chennai, and Kolkata.

• It was built under the National Highways Development Project (NHDP), starting in 2001.
• Picture the four cities as corners of a rough quadrilateral on the map — that’s where the name comes from.
• NHDP also built two diagonal corridors alongside it: the North-South and East-West Corridors.

3.2 Why did the Golden Quadrilateral matter so much for road travel?

• Its core achievement was converting long stretches of narrow two-lane highway into four-lane, divided carriageways.
• Four-laning cut travel times sharply, since traffic no longer shares one narrow lane in each direction.
• A median divider also cuts head-on collisions, one of the most dangerous accident types on undivided highways.

4.1 What does Bharatmala actually target, and how big is its budget?

Bharatmala Pariyojana was approved in 2017. It targets 34,800 km of new highways and expressways nationwide.

• Its total outlay runs to roughly ₹10.63 lakh crore.
• That money funds economic corridors, border roads, coastal roads, and greenfield expressways together.
• Unlike the Golden Quadrilateral’s single fixed route, Bharatmala spans many separate corridors across the country.

4.2 Is Bharatmala only about building brand-new roads?

• Bharatmala prioritises economic corridors — the routes carrying the heaviest freight traffic — ahead of smaller feeder links.
• It also funds upgrades to existing national highways, not just entirely new construction.
• It explicitly covers coastal roads and border-area connectivity, which earlier highway programmes had largely left out.
• It integrates with Sagarmala, India’s port-led development scheme, connecting new highways directly to ports.

5.1 What comes after Bharatmala? What does Vision 2047 add?

Highways already carry the vast majority of India’s road-based freight and passenger traffic.

• They do this despite making up only a small fraction of total road length.
• Roads stay cheaper and more flexible than rail for door-to-door freight over most Indian route lengths.
• India’s Vision 2047 plan targets up to 50,000 km of access-controlled expressways, well beyond Bharatmala’s current scope.

6.1 How has toll collection changed on national highways?

FASTag now covers more than 98% of all toll collection nationally.

• The network is moving toward Multi-Lane Free Flow (MLFF) tolling, using ANPR cameras and AI analytics.
• MLFF lets vehicles pay without stopping at all, as part of a shift toward barrier-free, zero-wait tolling.
• NHAI’s FASTag Annual Pass, launched August 2025, lets frequent travellers pay one flat yearly fee instead of tolls per crossing.

6.2 Are national highways doing anything to offset their environmental footprint?

• Under the Green Highways Policy 2015, about 1.32 lakh km of national highways have been planted with over 3.61 crore saplings.
• Newer construction uses recycled materials: bamboo crash barriers, fly ash, reclaimed asphalt, plastic waste in bitumen mixes, and treated sewage water.

A new four-lane corridor approved in Assam (2026)

The Cabinet Committee on Economic Affairs approved a new four-lane Guwahati-Tezpur corridor on NH-15 in Assam.

• The corridor spans 135.871 km, at a cost of ₹8,970.20 crore.
• It includes 5 major town bypasses spanning 58.7 km.
• It also includes a 4.9 km Emergency Landing Facility, built with the Air Force, along the Tezpur Bypass.
• Construction covers 15 major bridges, 30 minor bridges, 19 flyovers, and one elephant underpass at Tezpur.