A Vehicle Route Planning Method of Two-Phase Large-Scale Crowd Evacuation in Typhoon Relief Activities

Table 2

Symbols.

Sets
	Set of affected areas,		Set of temporary shelters,
	Set of medical rescue points,		Set of vehicles,
	Set of points passed by the (th) vehicle during its entire evacuation process
Parameters
	Capacity of the (th) vehicle		Quantity of people to be evacuated from the affected area
	Quantity of victims who can be accommodated by temporary shelter		Quantity of injured people who can be accommodated by hospital point
	Total departure time of the (th) vehicle in all evacuation tasks		Total return time of the (th) vehicle in all evacuation tasks
	Average running speed of the (th) vehicle under normal circumstances		Route distance from point to point by driving
	Proportion of casualties needing medical rescue at the affected area		Time needed for the (th) vehicle to execute evacuation tasks
Stochastic variables
	Road damage rate
	Road damage rate on the route from point to point by driving,
Variables
	Number of people (who do not need medical rescue from hospitals) who are transported by the (th) vehicle from point to point for the (th) time.
	Number of people (who need medical rescue from hospitals) who are transported by the (th) vehicle from point to point for the (th) time.
	Proportion occupied by the number of people (who do not need medical rescue from hospitals) who are transported by the (th) vehicle from point to point for the (th) time in the vehicle capacity.
	Proportion occupied by the number of people (who need medical rescue from hospitals) who are transported by the (th) vehicle from point to point for the (th) time in the vehicle capacity.
	Evacuation scheme for the (th) vehicle to drive from point to point for the (th) time,
	Driving route selection plan for the (th) vehicle in the entire evacuation process,