How to Judge the Distance Behind by Rearview Mirrors?

[DanteLynn]

Methods for judging the distance behind by rearview mirrors: Standard for adjusting rearview mirrors: Adjust the rearview mirrors properly. The standard for adjusting the side mirrors is to be able to see the door handles of your own rear doors, with the height of the door handles at the middle of the mirrors. Safe zone position in the rearview mirror: If the rear vehicle is in the safe zone and located in the center of the rearview mirror, it indicates a distance of approximately 15,000 mm to 20,000 mm from the rear vehicle, allowing normal turning operations. Non-safe zone position in the rearview mirror: If the rear vehicle occupies half of the rearview mirror area and only half of its body is visible, it indicates a very close distance to the rear vehicle. Maintain the current lane and do not turn.

[Connie]

Judging the distance of vehicles behind me using the rearview mirror has been my driving habit for years. I mainly estimate the distance by observing the size changes of the following vehicle in the mirror. Generally, if the rear vehicle appears very small in the mirror, like a distant dot, it indicates a distance of possibly over 50 meters. If the rear vehicle grows to almost fill the mirror, the distance is likely only 10-20 meters, and extra caution is needed when changing lanes or braking. I also adjust the mirror angles to reduce blind spots, such as aligning the car's front with the distant horizon to maintain a clear view. In actual driving, I often encounter situations where the rear vehicle follows too closely. In such cases, I slow down in advance to avoid sudden braking. Additionally, during rain or at night, poor reflection can affect judgment, so I always quickly turn my head to confirm blind spots. Safety first is key, and these methods help me avoid rear-end collisions. Once these habits are formed, judgment becomes intuitive, but beginners are advised to practice more in low-speed environments to improve observation.

[VonFinley]

As a young driver who frequently drives, I rely on rearview mirror images to quickly assess the distance of vehicles behind me. The proportion of the trailing car in the mirror is crucial: the smaller the car appears, the farther away it is; if it fills up half the mirror, it's very close, possibly around 15 meters. I like using mobile apps to assist with distance measurement, but most of the time, I depend on mirror visuals. Adjusting the rearview mirror angle is also important—I make sure to see the corners of the rear window and a bit of the sky to minimize blind spots. In traffic jams or on highways, distance perception becomes even more critical. If the trailing car rapidly grows larger, it means the other driver is accelerating toward me, and I immediately prepare to react. Additionally, window tinting can blur distance perception, so I opt for high-transparency films. In daily driving, these small techniques make lane changes and turns safer. Practicing repeated observations on city roads helps refine this skill over time.

[AlexanderLee]

In safe driving, I prioritize using rearview mirrors to judge distances and prevent accidents. The change in the size of the following vehicle is the main indicator: a small reflection indicates a long distance, while a large reflection suggests it's within a few meters. I adjust the rearview mirror position, avoiding sole reliance on it, and always remind myself to check blind spots. While driving, if the image in the rearview mirror rapidly enlarges, it means the vehicle behind is approaching me, and I immediately slow down or yield. In rainy or foggy conditions, visibility is poor, making distance judgment harder, so I turn on the rear fog lights for assistance. These habits help me stay safe on highways and reduce the risk of rear-end collisions.