Large-scale Evacuation of the Randstad Evacuation Simulations with the Dynamic Traffic Assignment Model Indy

Abstract. This research was carried out to create awareness of the fact that no official evacuation plans exist for the inhabitants in the densely populated area the ‘Randstad ’ in the West of The Netherlands, as well as to demonstrate that planning and optimizing evacuation strategies be-forehand generates large benefits for the evacuation process. 6 different evacuation strategies were simulated using the macroscopic dynamic traf-fic assignment model Indy. The final strategy has substantially shorter evacuation times compared to the reference scenario and can be used as the example evacuation strategy for this area. For generating this strat-egy, detailed information on the number of inhabitants, ground levels and number of inhabitants living in high buildings and flooding scenar-ios were used. This case serves as a proof of principle and demonstrates the benefits of a well-considered and optimized evacuation strategy