What is the purpose of green lasers on highways?

[MacMaddox]

Green lasers on highways are anti-fatigue laser lights that illuminate at night to prevent drivers from drowsy driving. Here are some precautions for highway driving: 1. Maintenance: Before driving on the highway, conduct a comprehensive inspection of your vehicle, especially checking the tire pressure and brake discs. Additionally, inspect the engine before entering the highway; it's best to perform a full vehicle maintenance. 2. Safety: Always prioritize your safety, so be mindful of certain taboos while driving. It's advisable to keep a safe distance from large trucks, especially if they are carrying cargo, as they can obstruct your view and make it difficult to assess road conditions. 3. Habits: Develop good safety habits, such as always wearing a seatbelt. When driving on the highway, sudden braking may be necessary in emergencies. Without a seatbelt, the inertia of the car could throw you forward.

[KateAnn]

That night when I was driving home on the mountain highway, I saw green laser beams flashing across the road. At first, I thought it was aliens, but later a traffic police friend told me it was an anti-fatigue device. Installed in certain accident-prone sections, the laser is hidden in the roadside guardrail, aimed at the lane position. Green is used because it's noticeable in the dark without being harsh. It detects abnormal vehicle speed and trajectory, such as when a drowsy driver drifts out of the lane, and automatically triggers the beam to remind you to stay focused. This device is common on southern mountain roads and is said to be quite effective. Combined with speed bumps and surveillance cameras, it can significantly reduce collisions. Of course, don’t rely on it entirely—on long drives, you should still take regular breaks, drink water, and stretch. Remember, safety is paramount. These little technological gadgets nowadays really give peace of mind.

[DiGianna]

From a safety design perspective, those green laser beams on highways are early warning systems to prevent fatigued driving. The working principle is quite straightforward: roadside laser emitters target the driving zone, and when vehicles pass through sensor areas where drivers are assessed as potentially drowsy or drifting, low-power green light is emitted to stimulate the retina, instantly heightening alertness. These devices are installed on high-risk curves or long straight sections to reduce nighttime accidents. Many cities like Chongqing have piloted them on mountain roads, with data showing significant reductions in accident rates. Of course, it's not just a standalone device—it's integrated into smart traffic networks and dynamically adjusted by monitoring systems in real time. If you see the light while driving, don't panic; it's simply reminding you: taking a break or checking your condition is the safer choice.

[SanKai]

As a travel enthusiast who frequently drives on highways, I consider green lasers to be safety signal lights. Simply put, they are installed in hazardous areas, emitting beams to remind drivers not to get distracted or doze off. For example, at the entrances of long tunnels or steep slopes, a flash of green light at night helps restore attention. Essentially, they function similarly to police lights or road signs, but lasers are more convenient for visibility in dark areas. During my road trips, I've noticed these devices are quite widespread and can help reduce rear-end collisions caused by fatigue. I remember one late-night drive when a green light prompted me to brake in time to avoid hitting an animal. A driving tip: when you see this light, take the opportunity to adjust your state—don't push yourself too hard.