What are the zigzag lines on the highway?

[DiStephanie]

The zigzag lines on the highway are called longitudinal deceleration markings. Precautions for driving on the highway are as follows: Check the vehicle condition in advance: Focus on fuel, engine oil, tire pressure, lights, etc., and plan the route. A driver with at least 3 years of driving experience should accompany you. Pay attention to lane speed limits: The minimum speed on the highway should not be less than 60 km/h, and the maximum speed should not exceed 120 km/h. Maintain a safe distance: Control your speed and try to keep a sufficient distance from the vehicle in front. Change lanes correctly: Do not cross multiple lanes at once. Before changing lanes, carefully observe the traffic conditions, use turn signals, and honk to alert other vehicles.

[Hawthorne]

I've been driving on highways for over a decade, and every time I see those zigzag lines, they feel like old friends reminding me to slow down a bit. They usually appear before sharp turns, tunnel entrances, or long downhill slopes. When tires roll over them, there's a slight vibration, like a little alarm clock waking up your attention. I remember last year during the rainy season, I encountered fog on a mountain curve and couldn't see the road ahead clearly. Thanks to these lines, I managed to slow down in time and avoided a rear-end collision. Highway authorities place these lines not for aesthetics but as a safety design—they increase traction and reduce skidding, especially during rain, snow, or at night. I've developed a habit of easing off the accelerator whenever I see them. I've also discussed this with fellow drivers, and we all agree that such small details make journeys safer. I always maintain proper following distance and speed—safety comes above everything else.

[AlexMarie]

As a non-professional who frequently studies road design, I believe that sawtooth markings are an intelligent innovation on highways. They are not randomly painted; instead, they utilize visual and tactile cues to remind drivers to slow down. When driving over them, the car vibrates, prompting an instinctive release of the accelerator. This is particularly effective in hazardous areas such as curves, reducing accident rates by over 30%. I've read some materials stating that engineers account for insufficient human reaction times by preemptively placing these markings in accident-prone zones to enhance safety. I've also observed them in different weather conditions—rain grooves help with drainage and skid prevention, while their reflective properties make them highly visible at night. I advise fellow drivers not to overlook these markings and to develop the habit of slowing down, collectively ensuring safer travels. While highways also feature solid and dashed lines, sawtooth markings are the most direct and practical.

[Tim]

When I first got my driver's license, I was curious about the purpose of the zigzag lines on the highway. Later, my driving instructor explained that they are deceleration warning lines. Driving over them creates a vibrating sensation, reminding you to slow down in advance to avoid danger, especially before curves or bridges. As a novice driver, they taught me not to get distracted and to always pay attention to speed control. Now, every time I see these lines on the highway, I remember my instructor's words: small oversights can lead to big accidents, so slowing down ensures safety. In bad weather, they help tires grip the road better, reducing accidents. This design is truly thoughtful and sensible.