The Grand Trunk Road is one of Asia's oldest and longest major roads. For at least 2,500 years it has linked Central Asia to the Indian subcontinent. It runs roughly 3,655 km (2,271 mi) from Teknaf, Bangladesh on the border with Myanmar west to Kabul, Afghanistan, passing through Chittagong and Dhaka in Bangladesh, Kolkata, Kanpur, Agra, Aligarh, Delhi, Amritsar in India, and Lahore, Gujrat, Rawalpindi, and Peshawar in Pakistan.

Dhaka, formerly known as Dacca, is the capital and largest city of Bangladesh. It is the ninth-largest and seventh-most densely populated city in the world. Dhaka is a megacity, and has a population of 10.2 million residents as of 2022, and a population of over 22.4 million residents in Dhaka Metropolitan Area. It is widely considered to be the most densely populated built-up urban area in the world. Dhaka is the most important cultural, economic, and scientific hub of Eastern South Asia, as well as a major Muslim-majority city. Dhaka ranks third in South Asia and 39th in the world in terms of GDP. Lying on the Ganges Delta, it is bounded by the Buriganga, Turag, Dhaleshwari and Shitalakshya rivers. Dhaka is also the largest Bengali-speaking city in the world.