Casualty transportation is one of the most critical actions in emergency logistics. Casualty transportation includes evacuation and people flow from affected areas to medical centers. Most of the researchers focus on minimizing the travel cost and travel time, as outlined in the Table I, II, and III. Minimization of travel time leads to improvement in overall response and is sought for identifying the right path with minimum risk for transportation. The objective functions that are used to optimize casualty transportation operations with the corresponding
constraints are depicted in Table 1 , 2 and 3. Important and recurrent objective functions discussed in literature and outlined in the table 1, 2 and 3.are: