The Grand Trunk Road was constructed by Sher Shah Suri, the founder of the Suri Dynasty. He renovated and expanded ancient routes, creating a well-planned highway stretching from Sonargaon in Bengal to Kabul. Sher Shah built sarais (rest houses), planted shade-giving trees, established milestones (kos-minars) and improved security along the route. The road played a major role in enhancing trade, communication and military movement. It became vital for the Mughal Empire and later for British administration. Sher Shah’s road network reflected his strong administrative vision and remains one of his greatest contributions to Indian infrastructure.