National Highway 1D (India, old numbering)

National Highway 1D (NH 1D), also known as Srinagar–Leh Highway, was a National Highway in the state of Jammu and Kashmir that connected Srinagar to Leh in Ladakh. The Srinagar-Leh Highway was declared as National Highway in 2006. It is now part of National Highway 1 that extends west to Uri.

The old Central Asiantrade route Srinagar–Leh–Yarkand was also known as the Treaty Road, after a commercial treaty signed in 1870 between MaharajaRanbir Singh and Thomas Douglas Forsyth.