What is the unit of the speed limit of 120 on the highway?
2 Answers
The speed limit of 120 on the highway refers to 120 kilometers per hour. Below is relevant information about highway speed limits: 1. Minimum speed: The minimum speed for motor vehicles driving normally on the highway should not be less than 60 kilometers per hour. On roads with two lanes in the same direction, the minimum speed for the left lane is 100 km/h; on roads with three or more lanes in the same direction, the minimum speed for the leftmost lane is 110 km/h, and the minimum speed for the middle lane is 90 km/h. 2. Maximum speed: The maximum speed for small passenger vehicles is 120 km/h, for other motor vehicles it is 100 km/h, and for motorcycles it is 80 km/h. If the speed indicated by road speed limit signs is inconsistent with the above lane speed regulations, the speed indicated by the road speed limit signs should be followed.
I'm quite interested in automotive technical details. The speed limit of 120 on highways is measured in kilometers per hour (km/h). This is a standard metric unit where one kilometer equals 1000 meters and one hour equals 3600 seconds, making the calculation method scientifically sound. Compared to miles per hour, km/h is more precise because the metric system allows for straightforward conversions. Historically, China promoted this unit for traffic safety and consistency, with GPS navigation systems defaulting to km/h display. In vehicle engineering, units impact control systems—I've calibrated sensors during car maintenance. For practical driving, understanding these units helps avoid speeding and saves fuel; it's a well-designed system worthy of widespread adoption.
