The effectiveness of platform screen doors for the prevention of subway suicides in South Korea

Yong Woon Chung, Sung Jin Kang, Tetsuya Matsubayashi, Yasuyuki Sawada, Michiko Ueda

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)


Background Subway suicide can significantly impact the general public. Platform Screen Doors (PSDs) are considered to be an effective strategy to prevent suicides at subway stations, but the evidence on their effectiveness is limited. Methods We assessed the effectiveness of installing half- and full-height platform screen doors in reducing subway suicides using Poisson regression analysis. Ten-year monthly panel data for 121 subway stations between 2003 and 2012 in the Seoul metropolitan area were used for the analysis. Results We found that installing PSDs decreases fatal suicide cases by 89% (95% CI: 57-97%). We also found that the installation of full-height PSDs resulted in the elimination of subway suicides by completely blocking access to the track area; however, half-height PSDs, which do not extend to the ceiling of the platform, were not as effective as full-height ones. Limitation Our findings were based on the data from a single subway operator for a limited period of time. Accordingly, we did not consider the possibility that some passengers choose to die at a station run by other operators. Our study did not examine the potential substitution effects of other suicide methods. Conclusion Installing physical barriers at subway stations can be an effective strategy to reduce the number of subway suicides; however, half-height PSDs are not as effective as full-height ones, even when they are as high as the height of an adult. Thus, these barriers should be made high enough so that nobody can climb over them.

Original languageEnglish
Pages (from-to)80-83
Number of pages4
JournalJournal of Affective Disorders
Publication statusPublished - 2016 Apr

Bibliographical note

Funding Information:
This work is financially supported by the Health Science Research Grants of Japanese Ministry of Health, Labour, Welfare (201419043A), JSPS Grants-in-Aid for Scientific Research (26870326), the National Research Foundation of Korea, and the Korean government (Grant no. 2013S1A3A2054749). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.

Publisher Copyright:
© 2016 Elsevier B.V. All rights reserved.


  • Metro suicide
  • Platform screen door
  • South Korea
  • Subway
  • Suicide
  • Suicide prevention

ASJC Scopus subject areas

  • Clinical Psychology
  • Psychiatry and Mental health


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