Study on the Posted Speed Limit of Chongqing Expressway

To cooperate with the west area highway speed limit standard and speed control standard research project,combined with existing speed limits,it selects 3 expressway sections of Chongqing (Yulin,Yuqian,Yuyi expressway) to analyze the rationality of speed limit from 3 aspects:operation speed ,over speed proportion,over speed scale. It can be a good reference for making up a rational speed limit standard and for scientific speed limit