What is the unit of the speed limit of 120 on the highway?

[LeAdelyn]

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.