Grand Trunk Road

Also called: Sher Shah Suri Marg, GT Road, Shahi road · Topic: Transport and Communication in India · NCERT: Class 10, Ch 7 "Lifelines of National Economy"; Class 12, Ch 7 "Transport and Communication"

Meaning

The Grand Trunk (GT) Road is one of the oldest and longest highways in South Asia. Sher Shah Suri rebuilt it in the 16th century as the Shahi (royal) road, joining the Indus valley in the north-west to the Sonar valley in Bengal. The British renamed it the Grand Trunk Road, running from Calcutta (Kolkata) to Peshawar (now in Pakistan). Inside India today, it runs from Amritsar (Punjab) to Kolkata (West Bengal).

It matters because it is the oldest trunk road (a main road that joins regions far apart) across the crowded Indo-Gangetic plain. Exams often test its builder, its old names and its end points then and now.

Explanation

Why and how it was built

• Cause: Sher Shah Suri, a 16th-century ruler, needed to hold his large empire together.
• Process: He built a long Shahi (royal) road across north India.
• It ran from the Indus valley in the north-west to the Sonar valley in Bengal in the east.

• Armies, officials and traders could now move quickly from one end of the empire to the other.

• Result: One road tied the far west and the far east of the kingdom together. This made it easier to rule the empire and helped trade grow.

How the road changed over time

Period	Name	End points
16th century (Sher Shah Suri)	Shahi (royal) road	Indus valley → Sonar valley (Bengal)
British period	Grand Trunk Road	Calcutta (Kolkata) → Peshawar (now in Pakistan)
Today (inside India)	GT Road / Sher Shah Suri Marg	Amritsar (Punjab) → Kolkata (West Bengal)

• Under the British: Modern roads before the 1940s were built mainly around towns, cantonments (army stations) and ports. They served British trade and the army. The GT Road was the main east–west link among them.
• After Partition: The Peshawar end went to Pakistan. So the Indian part now stops at Amritsar, near the border.

Its place in today's highway system

• It crosses the Indo-Gangetic plain through Delhi.
• Under the new national highway numbering, it is carried mostly by two National Highways:
• NH-44: the Amritsar–Delhi side.

• NH-19: the Delhi/Agra–Kolkata side.

• So today the GT Road is part of the National Highways (NH). These are main trunk roads built and maintained by the Central Government. They carry traffic between states and the movement of troops and supplies for defence.

Why the route works so well

• Flat land: The Indo-Gangetic plain has almost no hills, so a long road is cheap and easy to build.
• Many people and towns: This plain is one of the most crowded parts of India. Roads group around urban centres (towns and cities), so a road here has heavy traffic.
• Follows the river belt: The road runs along the Ganga plain, linking the farm belt of Punjab with the port and industrial area around Kolkata.

Where it occurs

• India (today): Amritsar (Punjab) → Delhi → Agra → Kolkata (West Bengal). It runs across the Indo-Gangetic plain through Punjab, Haryana, Delhi, Uttar Pradesh, Bihar, Jharkhand and West Bengal.
• Highways that carry it: NH-44 (Amritsar–Delhi side) and NH-19 (Delhi/Agra–Kolkata side).
• Pakistan: The British-era route continued west past Amritsar through Lahore to Peshawar, close to the Indus valley.
• Original span (Sher Shah Suri): from the Indus valley (north-west) to the Sonar valley in Bengal (east).

Don't confuse with

• Golden Quadrilateral (GQ): a 4-to-6-lane super highway that joins Delhi–Kolkata–Chennai–Mumbai–Delhi. It was started in 1999 under the NHDP. The GQ is a modern four-sided loop. The GT Road is an old, single east–west line. Its Delhi–Kolkata part runs through the same plain as the GQ's Delhi–Kolkata arm.
• East–West Corridor: runs from Silchar (Assam) to Porbandar (Gujarat). It is not the GT Road, even though both run east to west. The GT Road ends at Amritsar and Kolkata.
• North–South Corridor: runs from Srinagar (J&K) to Kanyakumari (Tamil Nadu). Its route is north to south, not across the Ganga plain.
• Nagpur Plan (1943): India's first road plan for the whole country. It sorted roads into four classes (NH, SH, district roads, village roads). It is a plan, not a road. Many students mix up "first road plan" (Nagpur, 1943) with "oldest road" (GT Road, Sher Shah Suri).

Prelims Hooks

• Builder: Sher Shah Suri (16th century) built it and called it the Shahi (royal) road. Trap: it was not a Mughal emperor or the British.
• Original span: Indus valley → Sonar valley (Bengal).
• British route: Calcutta (Kolkata) → Peshawar (now in Pakistan). The British gave it the name "Grand Trunk Road".
• Route in India today: Amritsar (Punjab) → Kolkata (West Bengal), through Delhi.
• Highway numbers: mostly NH-44 (Amritsar–Delhi) and NH-19 (Delhi/Agra–Kolkata).
• "Which of the following" trap: the GQ links Delhi–Kolkata–Chennai–Mumbai, the East–West Corridor links Silchar–Porbandar, and the GT Road links Amritsar–Kolkata. Do not swap these end points.

Mains Points

• Roads as tools of empire and unity (GS-I):
• Sher Shah Suri built the Shahi road to hold his empire together, from the Indus valley to Bengal.
• The British used it, along with roads around towns, cantonments and ports, to serve trade and the army.

• Today, as part of NH-44 and NH-19, it still links north-west and eastern India.

• Why the Indo-Gangetic plain is a transport spine (GS-I):

• Flat land and many people make road building cheap and traffic heavy.
• Roads crowd around urban centres. So the GT Road belt has many roads, while hilly, forest and remote areas have few.

• Example: road density in 2011 ranged from 12.14 km per 100 sq km in Jammu and Kashmir to 517.77 km in Kerala.

• Old route, modern role (GS-III):

• National Highways are only about 2% of road length but carry nearly 33% of road traffic (2019-20) [2].
• Old trunk routes like the GT Road form the base of the NH network. Corridor programmes (GQ, Bharatmala) and multimodal planning (PM Gati Shakti, 2021) build on them to cut travel time between economic centres.

Related concepts

• Nagpur Plan
• Road network of India
• National Highways
• National Highways Authority of India
• State Highways
• Rural roads
• Pradhan Mantri Gram Sadak Yojana

Read more

• Roads: history, network and classification