Starting from June 21, the "Alert Signal for Blind People", which received a
lot of attention from local citizens, will no longer work 24 hours a day.
Shanghai Traffic and Patrol Police Squadron will turn off the sound signals
during evenings, from 21:00 to 9:00.
Recently, Shanghai Traffic and Patrol Police Squadron installed two sets of
"Green Lights Counting Machine" and "Alert Signal for Blind People". After a few
days of operation, it was found out that these signals somehow disturbed nearby
residents in the evening.
On the evening of June 19, leading officials of Shanghai Traffic and Patrol
Police Squadron and other relevant departments went to the sight. After
adjustment, the sound signals will be turned off from 21:00 to 9:00. Engineering
staff said that since the technologies were not mature, the sounding signals
could only be turned on and off manually. In the future, they would try
automatic control.