On-line Deployment of Dynamic Traffic Assignment: Evaluation and Lessons

Route guidance has the potential to reduce delays and improve travel time reliability. Guidance based on short-term predictions of network state is expected to perform better than information derived from instantaneous traffic conditions. State-of-the-art Dynamic Traffic Assignment (DTA) models have been developed to generate consistent, anticipatory route guidance. This paper presents an on-line evaluation of DynaMIT, a real-time DTA system, DynaMIT has been integrated with real-time data from the traffic management center in Los Angeles, California. The system operates in a rolling horizon to estimate and predict network state in real-time, and generate route guidance. Critical components of the deployment are outlined, and an on-line system evaluation with real data is presented. The results indicate that DynaMIT is able to replicate and predict the conditions of a real-world network. Several key lessons were learned, suggesting directions for the future: sensor status, traffic signals, and incidents are critical information that need to be collected in a timely fashion to ensure accuracy; continuous evaluation and on-line calibration are necessary for system enhancement; suitable resources should be available for system sustainability over extended periods of time; additional tests should be conducted to evaluate the impact of route guidance.

• Corporate Authors:

  World Conference on Transport Research Society

  Secretariat, 14 Avenue Berthelot
  69363 Lyon cedex 07,   France 
• Authors:
  • Wen, Yang
  • Balakrishna, Ramachandran
  • Ben-Akiva, Moshe
  • Smith, Scott
• Conference:
  • 11th World Conference on Transport Research
  • Location: Berkeley CA, United States
  • Date: 2007-6-24 to 2007-6-28
• Publication Date: 2007

Language

• English

Media Info

• Media Type: CD-ROM
• Features: Figures; References; Tables;
• Pagination: 23p
• Monograph Title: 11th World Conference on Transport Research

Subject/Index Terms

• TRT Terms: Advanced traffic management systems; Computer online services; Dynamic traffic assignment; Real time information; Route guidance; Traffic data; Travel time
• Uncontrolled Terms: Travel time reliability
• Subject Areas: Data and Information Technology; Highways; Operations and Traffic Management; I72: Traffic and Transport Planning;

Filing Info

• Accession Number: 01117440
• Record Type: Publication
• Files: TRIS
• Created Date: Dec 30 2008 12:31PM