SUBREGIONAL ROUTE CHOICE MODELS WITH LINK TRAVEL TIMES REFLECTING INTERSECTION FLOWS. FINAL REPORT

In the route choice models evaluated in this report, the intersection traffic signals and the corresponding approach service levels are adjusted in relation to the predicted approach flows. An equilibrium between traffic signal settings that minimize total network travel time and route choices that are optimal from each user's point of view is sought. This problem is formulated as a bilevel nonlinear programming problem and termed the Traffic-Responsive Signal Control (TRSC) scheme. The TRSC scheme considers the effect of signal controls on traffic flows in the traffic assignment submodels. Alternative problem formulations and available solution algorithms are briefly reviewed. Eight models based on two traffic signal timing policies, two different treatments of two-way stop intersection, and two different weights for turning movements are thus formulated. Among them four models are illustrated and compared. The iterative optimization and assignment (IOA) solution algorithm is implemented to solve a large-scale real network: the Chicago Area Transportation Study North Shore regional network. This network contains 413 zones, 8408 nodes and 26,719 links, of which a study area consisting of 271 zones, 1059 nodes, and 2898 links is of primary interest. All the discussions are restricted to the study area unless otherwise stated. This study area may be the largest network that has been tested for any type of TRSC scheme up to now. It is observed that the solutions for the four models stabilize after six iterations of the TRSC scheme. The difference between the delay minimization and the equal degree of saturation traffic signal timing policies is not significant. For simplicity, the equal degree of saturation traffic signal timing policy may be safely used to approximate the delay minimization traffic signal timing policy. The treatment of two-way stop intersections by a simplified 1985 HCM method does not make much difference in the objective values as well. The model's performance and benefit that could be obtained from TRSC scheme are extensively described by eight network performance measures and comparative studies.

  • Corporate Authors:

    Illinois Transportation Research Consortium

    Chicago, IL  United States 

    Illinois Department of Transportation

    Chicago Area Transportation Study, 300 West Adams Street
    Springfield, IL  United States  60606

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Boyce, D E
    • Chen, H K
    • Rouphail, N
    • Sen, A
  • Publication Date: 1989-8

Language

  • English

Media Info

  • Pagination: 201 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00625102
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Report/Paper Numbers: FHWA/IL/RC-008
  • Contract Numbers: IHR-016
  • Files: TRIS, USDOT
  • Created Date: Oct 16 1993 12:00AM