Integrated Demand and Supply Model: A Network Wide Validation

The primary objective of this study is to demonstrate the possibility of using Network Fundamental Diagram (NFD) in investigating the performance of integrated demand and supply models. At the same time, it also seeks to establish how an integrated demand-supply model could be used to produce NFDs, which have long been used to study network flow characteristics. In this paper the Agent-Based Dynamic Activity Planning and Travel Scheduling (ADAPTS) dynamic activity-based model generates the demand and the TRansportation ANalysis and SIMulation System (TRANSIMS) has been used for traffic simulation. In order to properly model the dynamic interaction between the demand and supply models, a framework has been proposed and developed that tightly integrates the ADAPTS activity-based model with the TRANSIMS traffic simulation tools. Both models have been modified to support the continuous communication of vehicle information between them during the course of simulation. This allows the ADAPTS model to have full control over its agents during the traffic simulation and to be able to update its agents’ plans and schedules when necessary. The integrated model is then run to generate activities and simulate associated trips so as to generate the NFDs. Three hypothetical cordons of varying sizes are drawn around the central business district of Chicago to plot the diagrams. Several essential observations are then discussed in detail. These observations form a basis to validate the integrated framework. The results show that the observed dynamics in the simulated NFDs share certain similarities with the NFD drawn using loop detectors data; however, some inconsistencies are observed which are discussed in detail.

• Supplemental Notes:
  • This paper was sponsored by TRB committee ADB40 Transportation Demand Forecasting.
• Corporate Authors:

  Transportation Research Board

  500 Fifth Street, NW
  Washington, DC  United States  20001
• Authors:
  • Javanmardi, Mahmoud
  • Talebpour, Alireza
  • Fasihozaman Langerudi, Mehran
  • Mohammadian, Abolfazl (Kouros)
• Conference:
  • Transportation Research Board 93rd Annual Meeting
  • Location: Washington DC
  • Date: 2014-1-12 to 2014-1-16
• Date: 2014

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; Maps; References;
• Pagination: 21p
• Monograph Title: TRB 93rd Annual Meeting Compendium of Papers

Subject/Index Terms

• TRT Terms: Activity choices; Traffic assignment; Traffic simulation; Travel demand; Validation
• Geographic Terms: Chicago (Illinois)
• Subject Areas: Highways; Planning and Forecasting; I72: Traffic and Transport Planning;

Filing Info

• Accession Number: 01518745
• Record Type: Publication
• Report/Paper Numbers: 14-4298
• Files: TRIS, TRB, ATRI
• Created Date: Mar 21 2014 11:26AM