A stone causeway, measuring 4 kilometres in length and 20 metres in width, was found over Sone river in Bihar, north-eastern India. The structure is said to be a part of the Grand Trunk road, or Uttarpath, built by Afghan ruler Sher Shah Suri in the 16th century.

The site is located between Kanbaheli in Aurangabad district and Bansa in Rohtas district. The structure consists of a raised track across a water body. It was built out of 3 metre long dressed sandstone slabs, and parts of it are still undamaged. According to the experts the Grand Trunk road was reconstructed during Sher Shah Suri’s reign in the 16th century from present-day Afghanistan to Bangladesh. The route was renamed to “GT” by the British in the 17th century. It was one of Asia’s oldest and longest road and promoted trade and commerce in the southern and central parts of the continent. The tract was revealed probably due to heavy monsoon rains in Bihar and discharge of water on Sone river from the Indrapuri barrage that likely washed away the sand and silt deposits on the causeway and revealed its surface.

(after Daily News & Analysis)