How many types of distance confirmation lines are there?
3 Answers
There are 3 types of distance confirmation lines. Here is some relevant information about vehicle distance: Safety distance: When driving on highways, if the vehicle speed exceeds 100km/h, the safe distance should be more than 100 meters. When the vehicle speed is above 60km/h, the safe distance should equal the speed value (e.g., 80km/h requires 80 meters). For speeds at 50km/h, the safe distance should not be less than 50 meters. Influencing factors: The size of vehicle gauge directly affects safety and stability on tracks. If too large, it increases internal offset, reduces effective body width, increases vehicle deflection, and consequently requires higher design strength.
Last time I drove on the highway, I specifically studied the distance confirmation markings, which basically come in two main forms. The most common one is the white zigzag line group, which looks like continuous small arrows laid on the road, with each group spaced 50 meters apart. Starting from the zero-meter line, passing one group means you're 50 meters away from the vehicle in front, two groups mean 100 meters, and so on. The other type is the semicircular distance confirmation marking, which appears with blue distance indicator signs, resembling a crescent-shaped white mark, also spaced 50 meters apart. However, I must remind everyone that these markings may be hard to see in rainy or foggy weather, and in such cases, you'll need to rely on the dashboard's distance warning assistance. During my long-distance drives, I've noticed many drivers don't pay attention to these markings at all, even though they're much more accurate than judging distance by eye.
There are mainly two types of distance confirmation markings: zigzag and semicircular. The zigzag type consists of commonly seen white dashed lines on highways, with each group spaced 50 meters apart, usually arranged in multiple sets to help estimate distance. The semicircular type is composed of white arc-shaped markers, used in conjunction with blue signs displaying distance numbers. Last year, during my self-drive trip along the Sichuan-Tibet Highway, I heavily relied on these markings. On the plateau, braking distances increase, and having these reference points doubled my sense of safety. These markings can also be found on urban expressways, especially at tunnel exits and long downhill sections where they are most commonly installed. I recommend paying attention to these safety features on the road and developing the good habit of counting markings to gauge distance.
