公路快速客运安全保障系统是快速客运安全运行的关键。本文从系统分析的角度阐明了它的发展阶段性、不可靠性、脆弱性、不对称性和风险效应性,从交通组成的四要素,即人、车、路和环境入手,分析了公路快速客运安全保障系统的基本框架,建立了它的安全评估体系。最后从实际出发,提出了它运行所需要的技术和社会政策支持体系。 Highway rapid passenger safety system is the key to the safe operation of fast passenger transport. From the angle of system analysis, this paper expounds its stage of development, unreliability, vulnerability, asymmetry and risk-effect. Starting from the four elements of traffic composition, namely, people, vehicles, roads and environment, Passenger transport security system, the basic framework established its safety assessment system. Finally, from the reality, put forward the technical and social policy support system it needs.