An approximate method named CBMM,which is used in communication network at first,is chosen to evalute the travel time reliability of road network in this paper after studying various methods to calculate travel time reliability deeply.

• 在对各种路网行程时间可靠性的计算方法进行深入分析之后，本文选用了一种最初应用于电信网中的列举网络最可能状态法的近似算法CBMM来进行路网行程时间可靠性的评价。