The green laser light on the side of the expressway is actually an anti-fatigue laser light, which will automatically light up at night. As the name implies, the anti-fatigue laser light is mainly used to remind drivers to be vigilant and not to drive fatigue. At the same time, it can also make people's brains slightly awake to a certain extent.

Laser is just one of many measures to prevent fatigue driving on the expressway. In addition, there are more common flashlights and reflective belts, both of which have anti-fatigue effects. However, in order to prevent fatigue, it is necessary to improve the driver's awareness of safe driving and ensure enough rest time.

Extended data:

The working principle of green laser lamp is to change the visual fatigue caused by single driving environment on expressway through the change and stimulation of light. This kind of laser lamp has two modes: always on and stroboscopic, with a range of 2 kilometers. Most of them are set beside relatively straight highway sections, which will have a certain impact on vision.

Anti-fatigue laser lights are installed on the expressway, which can be stimulated by the change of light, thus changing the visual fatigue caused by a single driving environment. After many on-the-spot investigations and centralized argumentation, the high-speed traffic police set the laser light on the road section where the route is relatively straight and it is easy to cause fatigue driving, and adjusted the laser, which not only ensures the brightness, but also has a certain impact on the field of vision, which can effectively prevent drivers from fatigue driving.