STOP / Public facilities

When the subway doors are closing, people possible will being clamped if they rush into the carriage. And that may result in security incidents. “STOP”, a security device installed in the subway door, is achieved by plasma laser beam. When subway train doors are closing , “STOP” will cast a cautionary pattern,, to prevent people rush into the carriage, effectively prevent people from being clamped by the subway doors, thus avoiding incidents occur.