How to view the lower demarcation line of the left rearview mirror?
3 Answers
The lower demarcation line divides the left rearview mirror into a safe zone and a danger zone. The left one-third of the position is considered the danger zone, while the right two-thirds is the safe zone. Below is an introduction to the functions of the rearview mirror: 1. Convenience for the driver: To prevent traffic accidents and ensure personal safety, rearview mirrors must be installed on vehicles, and all mirrors must be adjustable in direction. The driver can directly obtain external information about the rear, sides, and lower parts of the car while seated in the driver's seat. 2. The range that the mirror can reflect: This depends on the distance between the driver's eyes and the rearview mirror, the size of the mirror, and the radius of curvature of the mirror.
Having driven for over twenty years, I can say adjusting the lower edge of the left rearview mirror is truly an art. Sit firmly in the driver's seat with your eyes looking straight ahead. Then adjust the mirror angle so that only a tiny edge of your car is visible in the mirror—ideally occupying about 1/4 of the space—while keeping the lower boundary line clearly visible to see the road's extension line. This way, while driving, you can use the reference line at the bottom of the mirror to judge blind spots or the distance of vehicles behind when changing lanes or turning. I often use it to assist in parallel parking: aligning the lower edge with the curb or wheel position to avoid scratches. The key is regular checks, as mirrors can easily shift on bumpy roads—this minor adjustment is crucial for safe driving. If not properly adjusted, it's like driving blind, drastically increasing the danger level. Make it a habit to glance at the mirror position to ensure it's stable before driving.
I remember when I was first learning to drive, my instructor emphasized the usefulness of the lower edge of the left rearview mirror. Sitting in the driver's seat, adjust the mirror so that only a small corner of the car body is visible, with the lower edge parallel to the road line. This way, while driving, you can directly see the rear movements from the bottom of the mirror without any blind spots. I often use it to assist in parking: align the lower edge with the tire position to easily judge the distance. Now it's second nature—I adjust it without thinking as soon as I get in the car. Don’t underestimate this small adjustment; if not done properly, changing lanes on the highway can lead to serious accidents. I’ve also added blind-spot mirrors for extra safety, but the basic adjustments shouldn’t be forgotten. Regularly clean the mirrors to avoid dust obstructing your view. Safe driving starts with these details, and once you get the hang of it, it’s really simple.
