What is the maximum speed limit on urban roads without markings?

[Diana]

For urban roads without a central dividing line, the speed limit is 30 kilometers per hour, while for urban highways it is 40 kilometers per hour. On urban roads with only one motor vehicle lane in the same direction, the speed limit is 50 kilometers per hour, and for urban highways it is 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 key parameters describing traffic flow and holds significant importance in traffic flow theory research. Classification of vehicle speed: To accommodate different purposes, vehicle speeds are mainly categorized into spot speed, segment speed, and design speed. Spot speed refers to the instantaneous speed of a vehicle passing a specific 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 mutual coordination.