The Within-Day Dynamic Traffic Assignment (WDDTA) models allow us to overcome the limits of static models. Among them, the Dynamic User Equilibrium (DUE) model embedded in Visum presents several new and unique features, yielding an algorithm highly efficient both in terms of memory usage and computing time. Thus, this model can be applied to large networks (hundreds of zones and up to one hundred thousand links and nodes) with long periods of analysis (possibly the entire day). It is particularly suitable for the following application fields.
- Simulation of heavily congested urban and extra urban networks, where oversaturation conditions and the back propagations of congestion among adjacent roads are present over a large part of the network for several hours each day.
- Simulation of networks with transient congestion effects, leading to route choice varying during the assignment period.
- Simulation of networks in presence of dynamic management and/or time varying access policies, such as time varying tolls, signal timing plans, lane usage permission.
- Simulation of incident effects and incident management
- Simulation of evacuation plans, in particular when the maximum evacuation time is required.
Below you can find a complete overview of the model underlying the Dynamic User Equilibrium procedure implemented in Visum. However, in order to improve readability, any bibliographic reference is omitted, along with many analytic proofs. The bibliography contains references to scientific papers, underlying theories, and approaches on which this model is based (Literature).
