National Highway 1 or NH 1 is a National Highway in Northern India that links the national capital New Delhi to the town of Attari in Punjab near the India–Pakistan border. This was a part of the historical Grand Trunk Road, that ran from Bengal to Kabul, built on earlier roads that existed from time immemorial. The National Highways Authority of India (NHAI) divided it into two parts—called as NH 1 west of Delhi, and as NH 2 east of it. The highway is maintained by National Highways Authority of India. This is one of the longest and oldest highways of India.