A methodology for computing time-dependent alternate routes around freeway incidents

This article introduces an approach that produces dynamic control strategies in the form of alternate routes around freeway incidents in response to the prevailing traffic conditions. The approach consists of a System Optimum Dynamic Traffic Assignment algorithm, a traffic simulator, a heuristic control strategies generation algorithm, and various communication and data processing components. The system is implemented and tested computationally on an example network in a simulated environment under various scenarios of incident severity and congestion levels. The results indicate that the system performs reasonably well for moderately congested networks and severe incidents.