Chapter
Apr 26, 2012
Consideration of Travel Time Reliability in Traffic Assignment
Authors: Xiaoyong Tang [email protected], Lin Cheng, and Shang XuAuthor Affiliations
Publication: International Conference on Transportation Engineering 2009
Abstract
This paper presents a general model for traffic assignment with travel time uncertainty. Factors involved in this model include expected travel time, travel time variance, travelers' risk aversion and the value of travel time variability. Traveler's risk aversion is supposed to be a random variable that follows a certain distribution among population. This model extends the multi-class model from the respects of utility function and risk classification. We also provide a feasible algorithm which combines the all-or-nothing (AON) assignment and Armijo-type linear search to solve this mode. The results of numeric experiment show that travel time reliability has obvious effect on model's output, and the flow on road links with large time variance is more sensitive to risk aversion.
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© 2009 American Society of Civil Engineers.
History
Published online: Apr 26, 2012
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ASCE Technical Topics:
- Algorithms
- Continuum mechanics
- Dynamics (solid mechanics)
- Engineering fundamentals
- Engineering mechanics
- Infrastructure
- Lifeline systems
- Mathematics
- Models (by type)
- Motion (dynamics)
- Probability
- Solid mechanics
- Traffic assignment
- Traffic engineering
- Traffic management
- Traffic models
- Transportation engineering
- Travel time
- Trip distribution
- Uncertainty principles
- Utilities
Authors
Affiliations
College of Transportation, Southeast University, Nanjing, China, 210096. E-mail: [email protected]
Lin Cheng
College of Transportation, Southeast University, Nanjing, China, 210096
Shang Xu
Chongqing Transport Planning Institute, Chongqing, China, 400020
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