They analyzed data from 71 stations in the Japanese metropolitan area from 2000 to 2010, during which 128 incidents of suicides occurred in these stations. In the 11 stations with blue lighting, after the installation of the self-related equipment in the booth, only a suicide incident occurred during the daytime.
Excluding the impact of factors such as the number of passengers, after the installation of blue lighting equipment, the number of suicide cases at each station dropped by an average of about 84%. Investigators say the phenomenon may be due to the calm blue mood. Ze Tiankang said that the installation of blue lighting is as effective as the installation of platform screen doors to prevent railway suicide.
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