What is the purpose of the green laser on highways?
3 Answers
The purpose of the green laser on highways is to remind drivers to stay alert and avoid fatigue driving. The green laser on highways is an anti-fatigue laser light, which has a long projection distance and is particularly noticeable at night. The laser light comes in two forms: continuous and strobe, with a range of 2 kilometers, effectively stimulating the driver's brain to prevent fatigue. The installation of anti-fatigue laser lights on highways can change the monotonous driving environment through variations in light, thereby reducing visual fatigue. After multiple on-site inspections and concentrated discussions, highway traffic police have placed the laser lights on relatively straight sections of the road that are prone to fatigue driving. The lasers are adjusted to ensure sufficient brightness while also providing a certain visual impact, effectively preventing driver fatigue.
As a long-haul truck driver, I've encountered many green lasers on highways, which are actually part of traffic monitoring systems. These lasers typically come from LiDAR devices installed roadside, designed to scan traffic density and vehicle speeds, helping traffic management departments adjust signals in real-time or send warnings to drivers. For instance, during rain, fog, or at night, green lasers are more visible, alerting us to congestion or accidents ahead and preventing rear-end collisions. I particularly rely on these devices during night drives, as they ensure safer following distances better than traditional road markings. In recent years, the government has heavily promoted this technology, combining it with AI cameras to significantly reduce accident rates. However, if maintenance is poor, malfunctioning lasers might cause misjudgments, so drivers should stay vigilant—slowing down or reporting any anomalies immediately. Overall, this is a modern safety measure that makes highway travel more secure.
From an engineering perspective, the green lasers on highways are primarily used in LiDAR systems as efficient traffic monitoring tools. They play a crucial role in speed measurement, vehicle position detection, and traffic flow control, especially during poor weather or low-light conditions. In terms of design, these devices are mounted on gantries or roadside poles, emitting laser beams to scan the road surface and collecting data to feed back to central processors. I've learned in related projects that this not only reduces the cost of manual patrols but also improves road utilization. Of course, installation and maintenance require consideration of environmental factors, such as avoiding direct laser exposure to drivers' eyes to prevent distraction. Overall, green lasers are an important component of intelligent transportation systems and may even be integrated into autonomous driving in the future, adding reliability to our journeys.
