How to Judge the Distance Behind by Looking at the Rearview Mirror?
2 Answers
There are three methods to judge the distance of the vehicle behind from the rearview mirror. The methods to judge the distance of the vehicle behind from the rearview mirror are as follows: 1. Vehicle size: The larger the size of the vehicle behind in the rearview mirror, the closer it is to the vehicle in front; the smaller the size, the farther it is from the vehicle in front. 2. Occupied area: If the vehicle behind almost fills the entire rearview mirror, the distance is approximately 3m; if it occupies about 2/3 of the rearview mirror, the distance is approximately 5m; if it occupies about 1/2 of the rearview mirror, the distance is approximately 9m; if it occupies about 1/3 of the rearview mirror, the distance is approximately 12m. 3. Vehicle position: If the vehicle behind is located on the outer side of the rearview mirror, it indicates that it is very close to the vehicle in front; if it is located on the inner side of the rearview mirror, it indicates that it is farther away from the vehicle in front.
After years of driving, I've learned that judging distance through rearview mirrors relies on several key points. When the following car fills the entire mirror, it's usually only 2-3 meters away - that's when extra caution is needed. If the car occupies just one-quarter of the mirror space, there's approximately 20-30 meters distance, making lane changes relatively safe. During reversing, paying attention to ground guide lines (a feature many cars have) provides more accurate reference. Rainy conditions and nighttime lighting can easily deceive your perception of distance, so it's wise to leave extra space. During my novice period, I practiced with fixed roadside poles several times to gradually develop distance awareness. Remember there's at least half a lane's width in the rearview mirror's blind spot - developing the habit of turning your head for a quick glance adds safety.
