What is the design principle of road traffic signs

In a very short time, easy to identify and memory requirements of the main design of road traffic is signs, which is the so-called road traffic sign recognition requirements. road traffic signs  visibility to house a traffic sign shape, color and symbol, commonly known as the traffic sign design "three elements". Mark 1 shapes of different shapes, in the identification process is different. Practice shows that, mark, equal area shape easy to recognize the order is: triangle, square, round and regular pentagons, eight polygon etc.. The visible edges more, visibility is poor. Rectangular flag easily with advertising and other structures are confused. Therefore, the United Nations and many countries praised told Mark road department uses three allows shape. But some countries (such as the United States, Japan, Australia) by the diamond as a warning sign. The reason is the diamond than triangle big area, enhance legibility. 2 color most psychology experts believe that the color of the visual is the most can arouse people to a stimulation of cable. Stimuli of different colors make people produce a kind of different mystical thinking reflected, namely produce visibility different. So as to improve people's ability of visual recognition, according to the researchers, in the fixed 230M horizon, corresponding to different zygomatic color vision clear area from that, in the same apparent refusal under logo color to yellow, the most obvious, followed by white, red, blue, green, black, etc.. In the visual clarity, combinations of colors chosen booth is crucial. General Mingguang color and dark match, visual clarity is the best. Sampling the road traffic sign colors, in addition to considering from the horizon, considering also psychological effect from people, so the intercalated road traffic signs color selection is basically the same. Like led flashing traffic sign  on human visual stimulation is specially strong. Make the person produces a sense of danger, said stop, the constraint of Italy in traffic, so the red used to ban standard state; yellow is more eye-catching, can arouse the people attention, including for ring, warning of Italy, the color used in the warning signs; blue is quiet in Italy, used for signage; green containing calm, peace of mind. Full of a sense of security, in traffic safety can be said traffic, high-speed on the road to road traffic signs, such as population mark, destination signs, toll logo and adopt green; black and white mainly zygomatic color collocation to enhance the effect, Solar Traffic Sign  color sense. The 3 icon icon text, symbols and patterns referred to as. Road traffic signs are mostly expressed in an attempt to conform to the requirements of the text, with simplicity and accuracy, the symbol is intuitive and monosemy, pattern common image and popularity. The symbol should be clear at a glance, it is not easy to be misunderstood, so that foreigners can understand the meaning of symbols. Icons to minimize the use of text, it used only when absolutely necessary. Lots of signs complex certain road conditions, use simple words can receive accurately and rapidly reflects the effect of the content. If "no", "limit the quality (or height, speed)". In addition, all warning signal light  plain text in the indication and guide sign. Road traffic sign design principles, mainly from the above several aspects to consider. They have individual characteristics of each white, and comprehensive features combined unified, the general principle is that the road traffic sign should be easy to identify, easy to remember.