The CBTC System of Urban Transit played an important role in transport efficiency,traffic safety,passenger comfort and so on.So it was stringently required RAM indicators.This paper established a scientific and standardized method to analysis the RAM index of the CBTC System.The method was verified.It had important significance for ensuring the reliability and security of the Signaling System.%城市轨道交通CBTC系统在提高运输效率、保证行车安全及旅客舒适度等方面发挥着重要作用,因此对其RAM指标具有很高的要求.本文针对CBTC系统建立科学规范的RAM指标分析方法并进行计算验证,这对于保证信号系统的可靠性及安全性具有重要的现实意义.
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