Why are there no lights on the highway?

At night, when driving on the highway you will see a lot of flashing lights in front and can clearly see the painted lines pointing on the road. However, if you look back, you will only see a dim night, and not a normal street light. Do you have this phenomenon?

On normal roads, there are usually lights. However, the lighting of the street lights is very low, but it also produces light scattering, which makes it easy for the driver to dazzle. Many times make it difficult for them to recognize traffic signs, road signs and obstacles on the road. On the highway, the amount of vehicles traveling is large, high speed, high lighting requirements, if the street lights affect the observation of the driver, it will cause traffic accidents. Therefore, in addition to petrol stations, repair stations and speed control stations on the roads, on highways there are often no street lights for lighting.

Even so, driving on the highway is still very convenient. This is because people often use a new type of sign that is reflective and reflective devices created from convex glass mounted on road signs on the road, mounted on the road signs. Normally, they do not glow, only when exposed to the strong light of the car light, these reflective devices converge light rays and reflect to the driver's face. The light The reflection of this type of reflective device is hundreds of times stronger than conventional paint, the reflection distance can be up to 1,000 m, in other words, the driver can see these reflections beyond 1,000 m, In addition to the distance of 400 m, the color, shape and symbol of this sign can be distinguished at a distance of 200m and can be clearly seen on the sign. They are like glowing jewels on highways, ensuring health and life safety for roadgoers in the evening.

Convex reflective glass is an optical lens with a very high refractive rate used to attach to the metal rim of the forming objects. The diameter of a convex glass is only half the diameter of a human hair. Usually, the object's reflection on the road to the light is a free reflection, there is no rule, in other words, most of the light is reflected around, only a small part returns to the source. shining. Therefore, the level of seeing is very low. The reflective film after irradiation of the metal film causes the parallel light rays to focus towards the light source of the object, making the planes of the irradiated object visible. Therefore, reflective film can glow brightly in the dark without itself having to waste energy.

Currently, these new types of reflective devices are used not only on highway sections, but also in traffic police uniforms, environmental officers, etc. It will be very effective.

Hoang Hoa