When you drive on the road, you will see signs and figures on the roadside. The role of traffic signs is to indicate the characteristics of roads, prompt drivers to operate, and ensure traffic safety. Then, what is the difference between the traffic signs on the highway and the signs on the roads?
1. The identifiability of the logo is suitable for high speed driving
The traffic volume and speed of the freeway are large, and the height and physical dimensions of the traffic signs are different from those of other roads. The design of traffic signs must ensure that the driver can see the characters or patterns on the sign board at a certain distance, and ensure that the driver can take the necessary measures to complete the prescribed traffic behavior according to the content of the sign.
When a car is driving at the speed that the freeway must reach, the length of the time is different from the discovery sign - the sign - start taking action - the mark disappears. The different age, sex and driving experience of the driver vary in the time of response to the message. Generally, 0.56 Between seconds and seconds, the design of the logo is determined by the size and height of the logo. At the same time, according to the international general rules, the relevant contents are expressed with the prescribed patterns, such as gas stations, maintenance points, restaurants and so on, so that the drivers in the high-speed travel can quickly identify and respond quickly.
Two, the variability of signs ensures the safety and smoothness of expressways.
Many traffic signs on expressways are variable pattern signs. For example, traffic signs change colors to mark the road ahead: it shows that green is all normal, yellow is crowded, red represents a front block, and the driver changes the driveway to other roads immediately. The variable speed limit sign can show the different speed from 20 km / h to 120 km / h to indicate that the driver can locate the speed at the level suitable to the maximum traffic volume, smooth the traffic flow, and give full play to the high speed characteristics. Under the weather conditions of heavy fog, snow and ice, the variable speed limit sign plays the role of providing real-time information, preventing accidents and ensuring the smooth road.
Three. The reflective characteristics of the logo make the driver look bright.
The traffic signs on the freeway usually do not use the light source of scattered light, because the incandescent light will cause the driver of high speed driving to be dazzled and lurk the hidden trouble. A new type of material, reflective film, is used for traffic signs on expressways. This kind of reflective film is laid on the traffic sign. When it is irradiated by other light sources, the light will be reflected to the driver's eyes, making the sign clear and bright. The reflectivity of the reflective film is 100 times stronger than that of the ordinary paint, and the reflection distance can reach more than 1000 meters, so that the driver can find it at a distance. The extensive application of reflective materials, after all, has greatly improved traffic safety.
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