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It may lead to a severe security issue when blind people cross the road with poor lightening conditions in the middle of the night, on account for being ignored by the drivers. While the LED light from the center of the stick will resolve the problem mentioned above by alarming the vehicle drivers of the blind passengers.
Simultaneously the intermittent buzz sound will be of great help to remind the
drivers give ways for the disabled in advance under this circumstance.
Beijing University of Technology