In order to present reasonable and effective traffic planning and management strategy under disaster conditions,the dynamic regional evacuation traffic assignment during the process of road transportation emergency planning and operations was studied.First,a cell-connector model for evacuation road network modeling was presented based on the revised cell transmission model.Then,we constructed a dynamic regional evacuation traffic assignment model with the minimal evacuation travel time as its object function and cell flow conservation and propagation as its major constraints.By solving this model,we can obtain the system’s optimal travel time,network clearance time,optimal flow staging at origins,optimal flow distribution at intersections and optimal evacuation route choice and destinations.Results of a case study show that this presented model can meet the modeling demand of mass evacuation road network and effectively describe the dynamics nature of evacuation traffic flow.