Adaptive Path Selection in Stochastic and Time-Dependent Traffic Networks
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摘要: 根据路段旅行时间具有随机性、时间依赖性等特点,将路段在不同时刻的旅行时间定义为离散随机变量;建立了随机的时间依赖网络的自适应路径模型,给出用多项式表示时间复杂性的算法,获得基于最小期望时间的所有节点到给定终点的自适应路径.出行者可以根据到达某节点的具体时刻选择下一步的最优路径.通过算例验证了算法的可行性.Abstract: The travel time for each road section at different time was defined as a discrete random variable according to the stochastic and time dependent properties of travel time in traffic networks.Based on this,an adaptive path selection model was built in stochastic,time dependent networks,and an algorithm with polynomial time complexity was given.By this model,travelers can obtain adaptive paths from all nodes to a specified destination with the least expected time,and then select an optimal route to their destination at any node according to the arrival time.In the end,an illustrative example verified the effectiveness of the algorithm.
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Key words:
- stochastic property /
- time dependency /
- traffic network /
- adaptive path /
- least expected time
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