What is the perspective on learning to use car rearview mirrors?

[LaJoseph]

The perspective on learning to use car rearview mirrors is: 1. Using the center of the rearview mirror as a reference line, when the vehicle body is outside the reference line and the rear vehicle cannot be fully seen, the distance is 5 meters; 2. When the rear vehicle can be completely seen in the rearview mirror and the vehicle body is on the reference line, the distance is 10 meters; 3. When the rear vehicle is aligned with the central axis of the rearview mirror and there is a width of one car between the vehicle in the mirror and the outer edge of the mirror, the distance is 15 meters; 4. When the rear vehicle is aligned with the central axis of the rearview mirror and there is a width of two cars between the rear vehicle and the outer edge of the mirror, the distance is 20 meters.