Authors: Ying Liu, Xiaorong Lai, and Gang-Len Chang
Journal: Transportation Research Record, No. 1964, 2006, pp 127-135
Staged evacuation is widely used under emergency situations where different parts of the target network may suffer different levels of severity over different time windows. By evacuating those populations in the network via an optimized sequence, the staged evacuation strategy can best utilize the available roadway capacity, optimally distribute the total demand over the evacuation time horizon, and thus minimize the network congestion level. This study has proposed a cell-based network model to capture critical characteristics associated with the staged evacuation operations. The proposed model features its capability in reflecting incident impacts and arrival patterns of evacuees in computing the optimal starting time and routes for each evacuation zone. The preliminary numerical results have demonstrated the potential for applying the proposed staged evacuation model in real-world emergency management and planning.