The Jammu-Srinagar national highway was closed for the fourth consecutive day on Friday even as agencies stepped up efforts to restore traffic by blasting boulders blocking roads, officials said. The highway was blocked due to landslides, mudslides and shooting stones at 33 places in Ramban and Udhampur districts apart from washing of a 150-feet long road stretch and an under-construction bridge due to flash-floods triggered by heavy rains. "Srinagar-Sonamarg-Gumri road closed for repair and maintenance. However Mughal road through for vehicular movement", the traffic department said.