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Feedback with Alternate Trip Assignment Approaches in the Four-Step Model.

机译:四步模型中使用备用行程分配方法的反馈。

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摘要

The traditional Four-Step Model is widely used in the Transportation Planning and Forecasting Process. However, the model itself has a structural defect: it is only equilibrium in terms of Trip Assignment. Thus it is often viewed as an inadequate, partial equilibrium model. To achieve an overall equilibrium in the Transportation Planning and Forecasting Process, a feedback process can be introduced into the Four-Step Model.;The objective of this research is to incorporate different feedback methods into the traditional Four-Step Modeling process to improve model performance. The specific approach herein is to examine the relative performance of direct and averaging feedback methods, and then to investigate the convergence of this two approaches by replacing User Equilibrium trip assignment with All-or-Nothing trip assignment during each feedback loop, but not in the original four step model application. An evaluation and comparison of these methods is presented. Two measures of effectiveness, the Root-Mean-Square Error (RMSE) and Total Vehicle Hours Traveled (VHT), are employed to test the convergence and evaluate the methods.
机译:传统的四步模型在运输计划和预测过程中被广泛使用。但是,该模型本身具有结构缺陷:就行程分配而言,它只是平衡的。因此,它通常被认为是不充分的局部均衡模型。为了在运输计划和预测过程中实现总体平衡,可以将反馈过程引入四步模型中。本研究的目的是将不同的反馈方法纳入传统的四步建模过程中,以提高模型性能。本文中的特定方法是检查直接和平均反馈方法的相对性能,然后通过在每个反馈循环中用“全部或全部”跳闸分配替换“用户平衡”跳闸分配来调查这两种方法的收敛性,但是在原始的四步模型应用程序。对这些方法进行了评估和比较。有效性的两种度量方法是均方根误差(RMSE)和总行驶小时数(VHT),用于测试收敛性和评估方法。

著录项

  • 作者

    Li, Zhen.;

  • 作者单位

    University of California, Irvine.;

  • 授予单位 University of California, Irvine.;
  • 学科 Engineering Civil.;Transportation.
  • 学位 M.S.
  • 年度 2014
  • 页码 70 p.
  • 总页数 70
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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