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In order to avoid the vehicle may exceed the white line at a red light or stop when the red light, and therefore safe for pedestrians to design the road block, the use of pedestrian countdown timer as a starter, showing the shape of varying lengths melody of rhythm, pedestrians through when will issue a different tone, coupled with zebra shape, as if playing a piano piece like another, less clear line of sight at night, the sound can be used to remind motorists of the presence of passers
ZHUANG YA HAN LIAN WAN RU