What is the purpose of green lasers on highways?
2 Answers
Green lasers on highways are "anti-fatigue laser lights." Their function is to illuminate at night, reminding drivers to stay alert and avoid drowsy driving. Highways often have straight roads with few fixed reference points, leading to monotonous driving actions and a single line of sight. Prolonged driving under such conditions can easily cause drowsiness, especially in summer when high temperatures during the day drain physical energy. Freight drivers often undertake long-distance trips at night, making them prone to fatigue driving, which has become a key illegal activity targeted by highway traffic authorities for prevention and enforcement. The installation of laser lights aims to stimulate drivers through changing light patterns, thereby alleviating the visual fatigue caused by the monotonous driving environment. After multiple on-site inspections and collective discussions, highway traffic police have placed these laser lights on relatively straight sections of the road where fatigue driving is more likely to occur. The lasers are adjusted to ensure sufficient brightness while also providing a visual impact. The laser lights operate in two modes: continuous and strobe, with a range of 2 kilometers. Laser lights are just one of many anti-fatigue measures implemented by highway traffic police. Other measures, such as flashing lights and reflective strips on highways, also serve anti-fatigue purposes. However, preventing fatigue ultimately requires raising drivers' awareness and ensuring adequate rest time.
Those green lasers seen while driving on highways are actually a safety alert system. I've noticed they're mostly installed in hazardous sections like curves or tunnel entrances, using bright green beams to grab drivers' attention. These laser lights, typically installed by traffic authorities, are particularly visible at night, helping prevent drowsy driving by reminding motorists to maintain safe distances or reduce speed. Technically, the lasers utilize high-energy green wavelengths that are easily detected by human eyes, coupled with sensors to monitor real-time vehicle speed; if overspeeding occurs, the system may trigger warnings or automatic recording. Having experienced them several times on highways, the sudden light flashes instantly refreshed my alertness, reducing drowsiness risks. However, they aren't vehicle components but external infrastructure - drivers simply need to comply with regulations while ensuring their own lighting systems function properly.
