What are the methods to judge the distance between vehicles?
2 Answers
Methods to judge the distance between vehicles are: 1. When the upper edge of the rear bumper of the preceding vehicle is visible, the distance is 1 meter; 2. When the lower edge of the rear bumper of the preceding vehicle is visible, the distance is 2 meters; 3. When the rear tires' lower edge of the preceding vehicle is visible, the distance is 3 meters; 4. If the vehicle's reflection occupies the entire rearview mirror, the distance is 3 meters; if it occupies two-thirds of the mirror, the distance is 5 meters; if it occupies half of the mirror, the distance is 9 meters; if it occupies one-third of the mirror, the distance is 12 meters. Reasons for maintaining distance: 1. To avoid rear-end collisions caused by sudden braking of the preceding vehicle; 2. To reserve reaction time for handling emergencies.
There's actually a simple way to judge the distance to the car in front while driving: when you can fully see the rear wheels of the preceding car touching the ground, the distance is roughly about 3 meters, which is just right for city driving. For a regular sedan, if you can't see the lower edge of the rear bumper of the car in front, the distance is within 2 meters, which is too close. On the highway, you can use the 'two-second rule'—when the car in front passes a fixed object, you silently count '1001, 1002'; if you haven't reached that point by the time you finish counting, it's safe. I usually observe in the rearview mirror: when the headlights of the car behind appear in the lower third of my rearview mirror, it means the car is at least 10 meters away; if the car fills the entire rearview mirror, it's very close. Remember to increase the safe distance on rainy days.
