Over 1,200 roads, including the Manali-Chandigarh national highway, in Himachal Pradesh continued to remain closed for the third consecutive day on Tuesday, an official said. However, traffic was allowed on the Shimla-Chandigarh highway for the first time in two days. CM Sukhvinder Singh Sukhu conducted an aerial survey of Kullu, Lahaul and Spiti, and Mandi districts.