What is the difference between velocity measurement and interval velocity measurement?

Velocity measurement is to randomly set a point on the road for speed measurement, and interval speed measurement is to measure the speed of the whole road.

Speed measurement:

The traffic police will take a speedometer and randomly place it at a point on the expressway. This kind of speed measurement is single-point, uncertain, mobile and inevitable for navigation.

Layer velocity measurement;

As long as the start time of the car entering the interval test is recorded, and then the end time of the car leaving the interval speed measurement is recorded, the average traffic speed can be accurately obtained by dividing the length of the interval speed measurement distance by the time spent, and the interval speed measurement is more reasonable.

In fact, speed measurement is also a fixed-point speed measurement, the difference is more flexible. Traffic police departments set up traffic speed measuring points and temporary speed measuring equipment in different sections to monitor the driving speed of vehicles in the sections. This kind of speed measurement has the characteristics of single point, uncertainty and fluidity, which is inevitable for navigation. Million car purchase subsidy