Who is responsible for closing roads and changing roads?

Road closure is a "traffic control measure", which is implemented by the traffic management department of the public security organ according to the relevant provisions of the Road Traffic Safety Law. Expansion: Detailed Rules for the Implementation of Highway Management Regulations: When roads, highway bridges and other structures are damaged, have insufficient bearing capacity or are in danger, highway management agencies should promptly notify local public security traffic management agencies to take traffic measures such as slowing down, driving in one direction, driving with limited load or closing the bypass, and should implement engineering measures such as maintenance, reinforcement and restoration as soon as possible. When large and medium-sized repairs, maintenance or reconstruction are carried out on the highway with large traffic flow, which may cause traffic jams, the highway management agency shall notify the local public security traffic management department to help ease traffic; If it is really necessary to interrupt traffic, it shall send a notice to the local public security traffic management organ in advance. When the national highway is interrupted for more than two days, it shall promptly report to the Ministry of Communications and the people's governments of provinces, municipalities and autonomous regions. The reporting procedure for traffic interruption of provincial, county and township roads shall be stipulated by the provincial highway department.