What does the sawtooth lane line on the highway mean?

[Pluto]

Highway sawtooth lane lines are a type of deceleration marking, which can be divided into horizontal markings and vertical markings. Below is a partial introduction to deceleration markings: 1. Deceleration markings can be categorized into horizontal deceleration markings and vertical deceleration markings. These are white dashed lines set up in toll plaza areas, exit ramps, or other sections where vehicle deceleration is required. They come in forms such as single dashed lines, double dashed lines, and triple dashed lines, arranged perpendicular to the direction of travel. 2. The primary function of deceleration markings is to create a sense of visual narrowing of the lane, inducing a feeling of pressure on drivers, thereby prompting them to automatically reduce speed at locations requiring deceleration, such as curves or slopes.

[McCooper]

The zigzag lane markings on highways are a type of visual warning sign, typically appearing at road edges or near merging areas. They serve to alert drivers of potential traffic flow changes, intersections, or hazardous zones ahead. I often see these markings while driving, such as near highway exits. Their design aims to make drivers aware that the road is no longer a standard straight line, prompting them to slow down and stay vigilant. Ignoring these zigzag lines and continuing at high speed can lead to misjudging distances, increasing the risk of rear-end collisions or skidding. In practice, when encountering zigzag lines, I instinctively check my rearview mirror and adjust my speed to a safe range. This is a thoughtful design from road engineers to help prevent accidents. Remember, during rain or at night, the reflective effect of zigzag lines is enhanced, providing better visual guidance. Don’t underestimate these small details—they can be lifesavers.

[McGrant]

The primary function of zigzag lane markings on highways is to serve as a warning, alerting drivers that road conditions are about to become more complex, such as approaching curves, toll booths, or merging points. From my driving experience, these markings are commonly seen at highway entrances in large cities, aiming to stimulate visual nerves with irregular patterns to prompt speed reduction and avoid sudden braking. Road designers opt for zigzag lines instead of straight ones because psychological studies show humans are more likely to notice dynamic changes, thereby enhancing driving safety. For novice drivers, it's advisable to gently tap the brakes, maintain a safe following distance, and check surrounding vehicles when encountering zigzag lines. Prolonged neglect may lead to unnecessary fines or minor collision incidents.

[VonHope]

I think the zigzag lane markings on highways are meant to alert us drivers about upcoming changes in road conditions, requiring extra caution, such as tunnel entrances or accident-prone areas. Every time I encounter these markings while driving, I ease off the accelerator slightly and focus more, because it's easy to drift out of the lane if not careful. From a practical standpoint, they help prevent issues caused by speeding by naturally prompting you to slow down.