Risk-Field Based Modeling for Pedestrian Emergency Evacuation Combined with Alternative Route Strategy

Figure 3

Sketch of the proposed route-choice mechanism. The black and red circles represent the disaster and pedestrian, respectively. The light blue circle is abstracted to describe the range of parameter . (a) The original state of evacuation with a preselected route for each pedestrian; (b) when pedestrian moves from A to B, he obtains the information about disaster and chooses a new path instead of the original path according to the rerouting principles.

(a)

(b)