Related regulations, there is no specific to Ms. Qiao "traffic light" sound of questions. "Red light stop, green line" is traffic common sense, but because can't see the blind friend, unable to figure out the traffic situation, often hesitate at the crossroads. But as ms Joe said, some sections of Shanghai the traffic lights installed on a voice reminders. In 2004, the Shanghai traffic department has 29 lights at intersections, modified light cancelled the original "green flash" link, reminded by voice instead of ten seconds before the green to red light began to sound the countdown. When a sharp sound "click, click, click," said green light; Pause when issued the "drop, drop, drop" the sound of the red light. Blind people can through different sound to identify traffic situations.

When the modification cost for a light at 10000 yuan, into buying. But the converted signal commissioning after a period of time, received many complaints reflect the "noise". To minimize the impact on the intersection of surrounding residents, voice prompt to open between 8 to 20 points each day, closing at night. Perhaps because of this reason, this kind of light later not to promote throughout the city.

That year until June of 2013, nanjing dong lu henan road intersection appeared "light warning device", this is a can "speak" light: as long as someone running a red light, voice prompt will ring out, warn pedestrians returned to the side of the road; After a lot of busy streets respectively installed voice traffic light. The upgraded light system to dissuade pedestrians jaywalk, run through red lights have played a role, can also help blind people to cross the road.

本文章由太陽能信號燈廠家提供。