Highway overrun checkpoint is an administrative law enforcement department under the jurisdiction of the transportation department. Highway overrun checkpoints are checkpoints to check whether transport vehicles are overloaded, super-long, super-wide, super-high and do not meet the requirements of road transport management. The out-of-gauge checkpoints on expressways are generally set up at toll stations, and the locations of out-of-gauge checkpoints on ordinary highways are uncertain. Highway overrun checkpoints are mainly responsible for formulating various systems of checkpoints; Carry out overrun detection on road vehicles; Supervise the rectification of over-limit vehicles; Collect and sort out the data and trends of over-limit stations; Manage and maintain the facilities and equipment of the over-limit station.