中文摘要：

随机、时变的交通流分布，偶发的交通事故等因素导致了路径随机的车辆旅行时间，也决定了现实城市交通网络中只存在随机最短路．已有的路径选择研究大都假设人们力求选择最短路，而通过实际调查发现：人们的择路行为依赖出行情景，随出行目的、约束时间、对路径的熟悉程度以及路径的不确定程度而变化．验证了城市交通中人们在不确定环境下的择路行为也符合展望理论．

英文摘要：

With the occasion of accidence, the stochastic and time-dependent traffic flow causes the uncertainty of travel time in urban traffic, which decides that there only exists dynamic stochastic shortest route. The paper presents a conclusion that vehicle routing choice is context-dependent and varies with traffic importance, time to be used for route, the range of travel time and traveler＇s acquaintance to the route, which is different from the existed hypothesis. Based on the empirical study, the paper gives a conclusion that vehicle routing behavior fits for the prospect theory