DAY-TO-DAY EVOLUTION OF NETWORK FLOWS UNDER ROUTE-CHOICE DYNAMICS IN COMMUTER DECISIONS
The day-to-day dynamics of commuter decisions on urban traffic networks induced by route-choice dynamics is investigated. More specifically, this investigation analyzes the stability and reliability of system performance due to route-choice dynamics under real-time information, relaxing key restrictions associated with user equilibrium models. A simulation-based framework is developed to analyze day-to-day dynamics by integrating an empirically calibrated model of route-choice decisions with a dynamic network assignment model. Computational experiments are used to investigate the effect of certain experimental factors--recurrent network congestion level, market penetration, nature of information, and frequency of information updates--on network performance stability and reliability. The findings provide evidence of considerable day-to-day variations and stochasticity in network flows and performance, even when departure-time decisions and the origin-destination matrix are assumed to be fixed. The results indicate that (a) network performance may deviate significantly from equilibrium because of route-choice decisions under information; (b) within-day route choices have a significant effect on day-to-day network flow evolution; (c) user equilibrium path flows may not be reached or may not be stable when uncoordinated route-choice decisions are made under real-time information; (d) route-choice decisions do not exhibit convergence to an equilibrium, although the switching rate may be near steady-state conditions; (e) advanced traveler information systems (ATIS) information strategies can affect both within-day and day-to-day dynamics; and (f) some information strategies can lead to improved reliability and stability but at the expense of longer trip times. The results indicate that the trade-off between trip time performance and stability must be considered in network analysis and design. These results have important implications for the design of traffic control strategies, more-effective ATIS implementation guidelines, and incident management strategies.
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Availability:
- Find a library where document is available. Order URL: http://www.trb.org/Main/Public/Blurbs/155463.aspx
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Supplemental Notes:
- This paper appears in Transportation Research Record No. 1894, Travel Behavior and Values 2004.
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Corporate Authors:
500 Fifth Street, NW
Washington, DC United States 20001 -
Authors:
- Srinivasan, K K
- Guo, Z
- Publication Date: 2004
Language
- English
Media Info
- Features: Figures; References; Tables;
- Pagination: p. 198-208
- Monograph Title: TRAVEL BEHAVIOR AND VALUES 2004
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Serial:
- Transportation Research Record
- Issue Number: 1894
- Publisher: Transportation Research Board
- ISSN: 0361-1981
Subject/Index Terms
- TRT Terms: Advanced traveler information systems; Commuters; Decision making; Departure time; Incident management; Network analysis (Planning); Origin and destination; Performance; Real time information; Route choice; Stochastic processes; Traffic control; Travel time
- Uncontrolled Terms: Network assignment; Network flows
- Subject Areas: Data and Information Technology; Highways; Operations and Traffic Management; Passenger Transportation; Planning and Forecasting; I72: Traffic and Transport Planning;
Filing Info
- Accession Number: 00984660
- Record Type: Publication
- ISBN: 0309094887
- Files: TRIS, TRB, ATRI
- Created Date: Jan 28 2005 12:00AM