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首页> 外文期刊>Computer-Aided Civil and Infrastructure Engineering >Travel Time Reliability Estimation Model Using Observed Link Flows in a Road Network
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Travel Time Reliability Estimation Model Using Observed Link Flows in a Road Network

机译:道路网中观测路段流量的行程时间可靠性估计模型

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摘要

This article formulates a model that calculates travel time reliability in a road network. The sources of uncertainty addressed by the model are traffic capacity and travel demand. Because travel time reliability estimation problem, in general, is formulated as a path-based problem, path enumeration can be required in advance. Thus, the path travel time reliability can depend on a path set enumerated in advance. For the purpose of determining the unique travel time reliability, a model that estimates stochastic path flows by using observed link flows is then presented. This method does not require predefined path set. However, this method is similar to the standard maximum likelihood (ML) estimation method, the method presented in this study is easier to be solved because the number of unknown parameters is much smaller than that of the standard ML estimation method. Numerical experiments using two networks are carried out to demonstrate the model presented in this article.
机译:本文制定了一个模型,该模型可计算道路网络中的行驶时间可靠性。该模型解决的不确定性来源是交通容量和旅行需求。因为通常将旅行时间可靠性估计问题表述为基于路径的问题,所以可能需要预先进行路径枚举。因此,路径行进时间可靠性可以取决于预先列举的路径组。为了确定唯一的行进时间可靠性,然后提出了一个模型,该模型通过使用观察到的链路流量来估计随机路径流量。此方法不需要预定义的路径集。但是,该方法类似于标准最大似然(ML)估计方法,由于未知参数的数量比标准ML估计方法少得多,因此本研究中提出的方法更易于解决。使用两个网络进行了数值实验,以证明本文提出的模型。

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