What does a speed of 30 mph mean?
1 Answers
A speed of 30 mph means 30 kilometers per hour. Here is the relevant introduction: 1. Meaning of speed: The distance a car travels in a unit of time, referred to as speed. The common units are kilometers/hour or meters/second. Vehicle speed is one of the three parameters used to describe traffic flow and holds significant importance in traffic flow theory research. Vehicle speed can also generally refer to the speed of motor vehicles. To suit different purposes, vehicle speeds are mainly categorized into spot speed, segment speed, and design speed. 2. Legal provisions: Article 78 of the "Regulations for the Implementation of the Road Traffic Safety Law of the People's Republic of China" stipulates that highways should indicate the speed of lanes, with the maximum speed not exceeding 120 kilometers per hour and the minimum speed not less than 60 kilometers per hour. On highways, the maximum speed for small passenger vehicles must not exceed 120 kilometers per hour, other motor vehicles must not exceed 100 kilometers per hour, and motorcycles must not exceed 80 kilometers per hour. When there are two lanes in the same direction, the minimum speed for the left lane is 100 kilometers per hour; when there are three or more lanes in the same direction, the minimum speed for the leftmost lane is 110 kilometers per hour, and the minimum speed for the middle lane is 90 kilometers per hour.
