关键词: 交通工程, 随机用户平衡, 广义成本, 路径选择, ATIS, 路段可靠性

Abstract: Travelers’ route choice behaviors are frequently influenced by ATIS. The study proposed a concept of generalized cost based on the stochastic user equilibrium assignment and the traffic flow theory. The generalized cost was defined as the linear weighted sum of travel time, traffic congestion degree, and section reliability. The travelers were divided into two classes: namely, “travelers with ATIS equipment” and “travelers without ATIS equipment”. With consideration of the stochastic variations of link capacity, travelers were assumed to choose their optimal routes while their generalized costs were minimized. Under those assumptions, a stochastic user equilibrium model was developed. An algorithm for the model using the diagonalization algorithm and MSA algorithm was also proposed. The equivalence and uniqueness of solution of the proposed model were demonstrated. Numerical example showed that the algorithm has a good convergence performance, and the proposed model can reflect the travelers’ route choice behavior in stochastic road networks under the influence of traffic information.

Key words: traffic engineering, stochastic user equilibrium, generalized cost, route choice, advanced traveler information systems (ATIS), section reliability