evidence: 3. Dr Syama Prasad Mookerjee Road Tunnel, Jammu and Kashmir (Longest Road Tunnel) Also referred to as the Chenani Nashri Tunnel, the Patnitop Tunnel, or simply, the Syama Tunnel, the Dr Syama Prasad Mookerjee Road Tunnel was inaugurated in the year 2017. The tunnel consists of two tubes that run in parallel directions to each other. While the primary traffic tunnel has a diameter of around thirteen meters, an additional safety tunnel of a diameter of six meters is also present right next to it. Located at an elevation of about four thousand feet, the Dr Syama Prasad Mookerjee Road Tunnel has successfully reduced the distance between Jammu and its capital from forty-one kilometres to a little over nine kilometres. Now, the time taken to travel between these two places is two hours less than it used to be.Length: 9280 meters, or roughly, 9.34 km. Places Covered: Starts from Chenani in NH44 and comes to an end at Nashri. In between these two, this tunnel also gives one access to places like Patnitop, Batote, as well as Kud.