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Title: CONSTRUCTING A NETWORK FUNDAMENTAL DIAGRAM: A SYNTHETIC ORIGIN-DESTINATION APPROACH

Abstract

The Network Fundamental Diagram (NFD) is increasingly used in traffic monitoring and control. One obstacle to a wider application of NFDs in network control is the difficulty of obtaining data from all vehicles traveling in the network to construct an accurate NFD. One solution is to estimate the NFD using data from only a fraction of vehicles (i.e., probe vehicles), where the probe vehicle market penetration rate (MPR) needs to be estimated. A previous study conducted by the authors demonstrated that a distance or time weighted harmonic mean was needed to estimate the flow- and density-based MPRs, respectively using a pairing k-mean clustering approach. This paper proposes another approach that utilizes probe vehicle and observed link volume data to estimate the MPR. A heuristic model is proposed to identify the optimum locations from which to collect link traffic volume data for use in the MPR estimation. The estimated MPR can then be used to construct the NFD. Results show that these models can accurately estimate the NFD with limited probe vehicle and link traffic volume data. Accordingly, the models can be used in the field to estimate the NFD using readily available loop detector and probe vehicle data. The idealmore » locations for traffic volume data collection can also be proactively chosen to generate optimum estimation results. Since the models proposed here show no significant gains with an increased magnitude of collected data after a certain threshold, they will be helpful, particularly when large-scale data collection is not affordable or realistic.« less

Authors:
 [1];  [2]
  1. Virginia Tech Transportation Institute
  2. Virginia Polytechnic Institute and State University; Virginia Tech Transportation Institute
Publication Date:
Research Org.:
Virginia Tech, Blacksburg, VA
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1491351
Report Number(s):
DOE-VT-0008209-C02
DOE Contract Number:  
EE0008209
Resource Type:
Conference
Resource Relation:
Conference: The Transportation Research Board (TRB) 98th Annual Meeting, at the Walter E. Washington Convention Center, Washington, D.C., January 13–17, 2019.
Country of Publication:
United States
Language:
English
Subject:
Spatial Analysis, Market Penetration Rate, NFD, Synthetic OD Estimation

Citation Formats

DU, Jianhe, and Rakha, Hesham. CONSTRUCTING A NETWORK FUNDAMENTAL DIAGRAM: A SYNTHETIC ORIGIN-DESTINATION APPROACH. United States: N. p., 2019. Web.
DU, Jianhe, & Rakha, Hesham. CONSTRUCTING A NETWORK FUNDAMENTAL DIAGRAM: A SYNTHETIC ORIGIN-DESTINATION APPROACH. United States.
DU, Jianhe, and Rakha, Hesham. Tue . "CONSTRUCTING A NETWORK FUNDAMENTAL DIAGRAM: A SYNTHETIC ORIGIN-DESTINATION APPROACH". United States.
@article{osti_1491351,
title = {CONSTRUCTING A NETWORK FUNDAMENTAL DIAGRAM: A SYNTHETIC ORIGIN-DESTINATION APPROACH},
author = {DU, Jianhe and Rakha, Hesham},
abstractNote = {The Network Fundamental Diagram (NFD) is increasingly used in traffic monitoring and control. One obstacle to a wider application of NFDs in network control is the difficulty of obtaining data from all vehicles traveling in the network to construct an accurate NFD. One solution is to estimate the NFD using data from only a fraction of vehicles (i.e., probe vehicles), where the probe vehicle market penetration rate (MPR) needs to be estimated. A previous study conducted by the authors demonstrated that a distance or time weighted harmonic mean was needed to estimate the flow- and density-based MPRs, respectively using a pairing k-mean clustering approach. This paper proposes another approach that utilizes probe vehicle and observed link volume data to estimate the MPR. A heuristic model is proposed to identify the optimum locations from which to collect link traffic volume data for use in the MPR estimation. The estimated MPR can then be used to construct the NFD. Results show that these models can accurately estimate the NFD with limited probe vehicle and link traffic volume data. Accordingly, the models can be used in the field to estimate the NFD using readily available loop detector and probe vehicle data. The ideal locations for traffic volume data collection can also be proactively chosen to generate optimum estimation results. Since the models proposed here show no significant gains with an increased magnitude of collected data after a certain threshold, they will be helpful, particularly when large-scale data collection is not affordable or realistic.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {1}
}

Conference:
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