Modeling Impact of Transit Operator Fleet Size under various Market Regimes with Uncertainty in Network
Modeling Impact of Transit Operator Fleet Size under various Market Regimes with Uncertainty in Network
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DOI：
10.3141/2063-03
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发表时间：
2008-01
影响因子：
1.7
通讯作者：
Zhi-Chun Li;W. Lam;A. Sumalee
中科院分区：
文献类型：
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作者：
Zhi-Chun Li;W. Lam;A. Sumalee
提出了一个基于网络的模型，用于研究在不同市场机制下，公交运营商的车队规模对具有不确定性的网络的影响。有关的市场制度包括垄断、自由竞争和寡头垄断。在所提出的模型中，公交运营商的目标是确定车队规模，以优化其目标函数，同时考虑公交乘客的出行选择决策，使他们自己感觉到的出行不利程度最小化。为了考虑不确定性对公交网络的影响，该模型将公交服务的不可靠分量纳入到乘客效用函数中，这主要是由于车内行驶时间和公交车辆在停靠点的停留时间的变化造成的。通过一个数值算例说明了该模型的应用。计算结果表明，公交服务不可靠会显著影响公交系统性能和公交乘客的出行选择行为。
A network-based model is proposed for investigating the impact of transit operator fleet size on a network with uncertainty under various market regimes. The market regimes concerned include monopoly, free competition, and oligopoly. In the proposed model, the transit operator aims to determine fleet size to optimize its objective function while accounting for transit passengers’ travel choice decisions that minimize their own perceived disutility of travel. To consider the uncertainty effects on transit networks, the proposed model incorporates the unreliability component of transit services into the passenger disutility function, which is mainly due to variations in in-vehicle travel time and the dwell time of transit vehicles at stops. A numerical example is used to illustrate the application of the proposed model. Numerical results show that transit service unreliability could significantly influence transit system performance and the travel choice behavior of transit passengers.