
Jahangir under his reign issued a decree that all sarais be built of burnt brick and stone. More sarais were built under the Mughals. His son Islam Shah Suri constructed an additional sarai in-between every sarai originally built by Sher Shah Suri on the road toward Bengal. Those who stopped at the sarai were provided food for free. Gardens were also built alongside some sections of the highway. At every 2 kos, a sarai was built, the number of kos minars and baolis increased. Fruit trees and shade trees were planted. The old route was further rerouted at Sonargaon and Rohtas and its breadth increased. Sher Shah Suri, the medieval ruler of the Sur Empire, took to rebuilding Chandragupta's Royal Road in the 16th century. The emperor Kanishka is also known to have controlled the Uttarapatha. The emperor Ashoka had it recorded in his edict about having trees planted, wells built at every half kos and many "nimisdhayas", which is often translated as rest-houses along the route. The route of Chandragupta was built over the ancient " Uttarapatha" or the Northern Road, which had been mentioned by Pāṇini. Constructed in eight stages, this road is said to have connected the cities of Purushapura, Takshashila, Hastinapura, Kanyakubja, Prayag, Patliputra and Tamralipta, a distance of around 2,600 kilometres (1,600 mi).

Chandragupta Maurya had a whole army of officials overseeing the maintenance of this road as told by the Greek diplomat Megasthenes who spent fifteen years at the Mauryan court. The Mauryas had maintained this very ancient highway from Takshashila to Patliputra (present-day Patna in India). Takshashila was well connected by roads with other parts of the Mauryan Empire. During the time of the Mauryan Empire in the 3rd century BCE, overland trade between India and several parts of Western Asia and Bactria world went through the cities of the north-west, primarily Takshashila and Purushapura modern-day Peshawar (in present-day in Pakistan). The precursor of the modern Grand Trunk road was built by the emperor Chandragupta Maurya and was based on the highway running from Susa to Sardis. The road connected the eastern region of India with Central Asia and Ancient Greece. The Buddhist literature and Indian epics such as Mahabharata provide the existence of Grand Trunk road even before the Mauryan empire and was called Uttarpatha or the "Northern road". The Grand Trunk Road is still used for transportation in present-day Indian subcontinent, where parts of the road have been widened and included in the national highway system. Over the centuries, the road acted as one of the major trade routes in the region and facilitated both travel and postal communication. The road coincides with current N1, Feni,( Chittagong to Dhaka), N4 & N405 (Dhaka to Sirajganj), N507 (Sirajganj to Natore) and N6 (Natore to Rajshai towards Purnea in India) in Bangladesh NH 12 ( Purnea to Bakkhali ), NH 27 ( Purnea to Patna), NH 19 ( Kolkata to Agra), NH 44 ( Agra to Jalandhar via New Delhi, Sonipat, Panipat, Ambala and Ludhiana) and NH 3 ( Jalandhar to Attari, Amritsar in India towards Lahore in Pakistan) via Wagah N-5 ( Lahore, Gujranwala, Gujrat, Lalamusa, Jhelum, Rawalpindi, Peshawar and Khyber Pass towards Jalalabad in Afghanistan) in Pakistan and AH1 ( Torkham- Jalalabad to Kabul) to Gazani in Afghanistan. The road was considerably rebuilt in the British period between 18. The Afghan end of the road was rebuilt under Mahmud Shah Durrani. The old route was re-aligned by Suri to Sonargaon and Rohtas. It was rebuilt many times under Sher Shah Suri, the Mughals and the British along a partly similar route. Further improvements to this road were made under Ashoka. Ĭhandragupta Maurya of the Mauryan Empire in ancient India, built his highway along this ancient route called Uttarapatha in the 3rd century BCE, extending it from the mouth of the Ganges to the north-western frontier of the Empire. It runs roughly 2,400 km (1,491 mi) from Teknaf, Bangladesh on the border with Myanmar west to Kabul, Afghanistan, passing through Chittagong and Dhaka in Bangladesh, Kolkata, Allahabad, Delhi, and Amritsar in India, and Lahore, Rawalpindi, and Peshawar in Pakistan. For at least 2,500 years, it has linked Central Asia to the Indian subcontinent. The Grand Trunk Road formerly known as Uttarapath, Sarak-e-Azam, Badshahi Sarak, Sarak-e-Sher Shah is one of Asia's oldest and longest major roads. In India, GT Road coincides with NH 19 and NH 44 of National Highways in India.
