The Manali-Keylong National Highway has been closed to traffic due to inclement weather. The Border Roads Organisation (BRO) has told the state administration that it would not open the Rohtang Pass in the event of fresh snowfall.The Rohtang Pass was closed twice during November due to snowfall. It was cleared by the BRO to enable the stranded vehicles and the people to reach their destination, but now the BRO will open it only after the winter is over. The road was opened for a day today to enable tribals to return to Lahaul from Kullu.Despite the weather being dry, the mercury stayed 10 to 15 degrees Celsius below the freezing point in the high-altitude tribal areas and mountain passes, resulting in the freezing of water and making driving hazardous.Residents of Lahaul-Spiti are annoyed over the closure of the Rohtang Pass. They said barring a few spots like Rahni Nullah and Byas Nullah, there was no risk and the Pass could remain open until the place witnessed heavy snowfall.