10. Traffic Assignment
The chapter discusses traffic assignment, focusing on the allocation of trip interchanges to transportation systems in order to replicate observed vehicular movements. It details different methods of traffic assignment, including All-or-Nothing, User Equilibrium, and System Optimum Assignment, outlining their applications, assumptions, and limitations. The chapter also covers iterative methods for link flow calculation and touches on additional assignment methods such as Incremental and Capacity Restraint assignments.
Enroll to start learning
You've not yet enrolled in this course. Please enroll for free to listen to audio lessons, classroom podcasts and take practice test.
Sections
Navigate through the learning materials and practice exercises.
What we have learnt
- Traffic assignment is essential for estimating link traffic volumes and interzonal travel costs.
- Different models, such as All-or-Nothing and User Equilibrium, provide frameworks for understanding travel patterns.
- Assumptions play a crucial role in determining the effectiveness of various traffic assignment methods.
Key Concepts
- -- Traffic Assignment
- The process of allocating trip interchanges to a transportation network to reflect patterns of vehicular movement.
- -- User Equilibrium Assignment (UE)
- A traffic assignment method based on the principle that no driver can reduce their travel costs by unilaterally changing routes.
- -- System Optimum Assignment (SO)
- A model that minimizes total system travel time by suggesting optimal routes for drivers.
- -- AllorNothing Assignment (AON)
- An assignment method where trips are loaded onto a single minimum cost path, ignoring link congestion.
Additional Learning Materials
Supplementary resources to enhance your learning experience.