Highway traffic accident dynamic early warning is the effective way to prevent traffic accidents.The expressway traffic accident causing mechanism analysis and hazard analysis,constructing dynamic early warning index system,and determining the warning indicator alarm limit interval.Based on the theory of extension,the warning level,evaluation index and index limit are combined into matter element.The matter element model is determined by thematter element expression relationship establishment.Then calculating the correlation function matrix,determining the weight of each correlation degree based on the AHP method,and judging the early warning level,in order to achieve the purpose of accident prevention.%高速公路交通事故动态预警是预防交通事故发生的有效途径.通过高速公路交通事故致因机理分析和危险源分析,构建动态预警指标体系,并确定各项预警指标的警限区间.基于可拓学理论,将预警等级、评判指标和指标限值结合成物元,通过物元表述关系式建立预警等级确定的物元模型,计算关联函数矩阵,以及基于层次分析法确定权重的各等级关联度,判断交通事故发生风险的预警等级,以达到事故预控的目的.
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