What is the speed limit on urban roads?

[Zelda]

If it is an urban road without a centerline, the speed limit is below 30 kilometers per hour, and for urban highways, it is below 40 kilometers per hour; for urban roads with only one motor vehicle lane in the same direction, the speed limit is below 50 kilometers per hour, and for urban highways, it is below 70 kilometers per hour. Definition of vehicle speed: Vehicle speed refers to the distance a vehicle travels per unit of time, abbreviated as speed, commonly measured in kilometers per hour or meters per second. Vehicle speed is one of the three parameters used to describe traffic flow and holds significant importance in the study of traffic flow theory. Classification of vehicle speed: To suit different purposes, vehicle speed is mainly categorized into spot speed, segment speed, and design speed. Spot speed refers to the instantaneous speed of a vehicle passing a specified point on the road. Design speed is the speed established to determine the design indicators of various geometric elements of the road and ensure their coordination.