What is the minimum speed limit on national highways?

[VanFernando]

National highways have a speed limit standard of 60-80 km/h, with the minimum speed being 60 km/h. Below is detailed information about vehicle speeds: 1. Overview: Vehicle speed refers to the distance a vehicle travels per unit of time, commonly referred to as speed, with units typically being kilometers per hour (km/h) or meters per second (m/s). Vehicle speed is one of the three key parameters used to describe traffic flow and holds significant importance in traffic flow theory research. 2. Other aspects: Vehicle speed can also broadly refer to the speed of motor vehicles. To suit 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 parameters of various geometric elements of a road and ensure their coordination.