附加安全措施是必要的关卡；附加安全措施是应用于平交道口的额外处理，以减少平交道口的违章事故数量。
SSMs are deterrents; they are additional treatments that can be applied to grade crossings that will reduce the number of grade crossing violations.
经现场初步勘察，倒塌事故可能是由违章施工所致。
According to an initial investigation, the accident may have been caused by a violation of construction procedures.
你对违章讲人情，事故对你不留情。
You talk about human violations, accidents do not benefit you.
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