What is the maximum speed of a car?

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The maximum speed of a car is 20 kilometers per hour. Below is a detailed introduction about vehicle speed: 1. Overview: Vehicle speed refers to the distance a car travels in a 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. 2. Others: Vehicle speed can also broadly refer to the speed of motor vehicles. To suit different purposes, vehicle speed is mainly categorized into spot speed, segment speed, and design speed. Spot speed is the instantaneous speed of a car 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 to ensure their coordination.