The frequency of incidents negatively changes public perception with regard to the public safety in transit systems. The level of safety expressed as performance measures, ensures contractors and users that a quality safety level is maintained. Both the private and public sectors in the U.S. annually report accurate data to the National Transit Database (NTD) to be used in assessing the progress of the nation's public transportation systems. Although they must provide both the annual report and monthly reports including Safety and Security data, measures are only grouped into the indicators of efficiency and effectiveness of a system and there is a distinct lack of safety performance measures. This paper makes a comparison between the safety indicator values in large and small areas, and finds the correlation between system effectiveness and safety measures. Comparison results provide evidence that not every effective system is safe. Finally, three safety indicators are suggested which enables transit agencies to find their system’s weaknesses in terms of safety.

中文翻译：

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在国家运输数据库中建议一项新的运输绩效衡量标准

事件的发生频率负面改变了公众对公交系统公共安全的看法。以性能度量表示的安全级别可确保承包商和用户保持质量安全级别。美国的私营部门和公共部门每年都向国家运输数据库（NTD）报告准确的数据，以用于评估国家公共交通系统的进展。尽管它们必须同时提供年度报告和月度报告，包括安全和安保数据，但措施仅归类为系统的效率和有效性指标，并且明显缺乏安全绩效措施。本文对大小区域的安全指标值进行了比较，并找到系统有效性和安全措施之间的关联。比较结果提供了证据，表明并非每个有效的系统都是安全的。最后，提出了三个安全指标，这些指标使公交机构能够发现其系统在安全方面的弱点。