Title page for ETD etd-06062008-152403

Type of Document Dissertation
Author Lee, Sang-Keon
URN etd-06062008-152403
Title An adaptive strategy for providing dynamic route guidance under non-recurrent traffic congestion
Degree PhD
Department Civil Engineering
Advisory Committee
Advisor Name Title
No Advisors Found
  • adaptive strategy
  • user equilibrium
  • Dynamic Route Guidance System
  • ATIS System Optimal
  • integrated traffic simulation
  • non-recurrent congestion
Date of Defense 1996-05-28
Availability restricted

Traffic congestion on urban road networks has been recognized as one of the most serious problems with which modern cities are confronted. It is generally anticipated that Dynamic Route Guidance Systems (DRGS) will play an important role in reducing urban traffic congestion and improving traffic flows and safety. One of the most critical issues in designing these systems is in the development of optimal routing strategies that would maximize the benefits to overall system as well as individual users.

Infrastructure based DRGS have advantage of pursuing system optimal routing strategy, which is more essential under abnormal traffic conditions such as non-recurrent congestion and natural disaster. However user compliance could be a problem under such a strategy, particularly when some of equipped drivers are urged not to choose minimum travel time path for the sake of improving the total network travel time. On the other hand, In-vehicle based DRGS can utilize the user-specified route selection criteria to avoid "Braess Paradox" under normal traffic conditions. However, it may be of little use under abnormal traffic conditions and high DRGS market penetration.

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