What does the white semicircular marking mean?
3 Answers
White semicircular markings are distance confirmation lines. The radius of the white semicircular distance confirmation line is 30cm, spaced at 50m intervals, and typically set continuously along certain road sections. Additional details are as follows:1. White parallel thick solid lines: Used to provide drivers with a reference for maintaining a safe driving distance, often used in conjunction with distance confirmation signs. These are placed in areas prone to overtaking, accidents, or other necessary sections. The purpose of highway distance confirmation markings is to remind drivers to maintain a safe distance from the vehicle ahead to prevent traffic accidents.2. White zigzag distance confirmation lines: These lines have a total width of 300cm, with line widths of 40cm or 45cm. Starting from the base point at 0m, they are placed every 5 meters, with two lines forming a group, spaced 50m apart, and repeated in five groups. Multiple groups may also be set based on site conditions.3. White rectangular distance confirmation lines: Used in conjunction with distance confirmation signs, these are placed in areas prone to overtaking, accidents, or other necessary sections. The purpose of highway distance confirmation markings is to remind drivers to maintain a safe distance from the vehicle ahead to prevent traffic accidents.
I've been on the road for twenty years and seen plenty of vehicle maintenance details. That white semicircular mark usually appears on the tire sidewall—it's a small icon design pointing to the wear indicator blocks within the tread pattern. Simply put, when the tread wears down to the height of these blocks, it means the tire needs replacing because it leads to reduced grip and makes the car prone to skidding in rainy conditions. Every time I wash my car, I take a quick glance at this mark since it's not very noticeable and beginners often overlook it. I remember one time I got careless—a tire wore flat and blew out, nearly causing an accident. Routine checks should also include tire pressure and overall tire wear to ensure safe driving. Developing this habit can save you a lot of trouble.
When I first got my driver's license, I was very curious about the small white semicircle mark on the tires. After researching, I learned that it indicates the tire wear limit. Specifically, there's a small rubber protrusion deep in the tire tread. When the tread wears down to the level of this protrusion, it's time to replace the tires. I check it every month when I inspect the tire pressure, just to be safe. New drivers should pay special attention to this, as it affects braking performance. Additionally, understanding this mark can help you save money on maintenance by replacing tires early to avoid major repairs. In short, starting with daily maintenance is crucial.
