Vehicle Routing Problem for Collaborative Multidepot Petrol Replenishment under Emergency Conditions

Table 3

Judgement variables.

Decision variables	Definition
	When the distribution truck k serving route , the variable value is 1; otherwise, it is 0,
	When the petrol tanker o transfers the petrol p from the petrol depot to h, the variable is 1; otherwise, it is 0,
	When the petrol station j is visited by the distribution truck k, the variable is 1; otherwise, it is 0,
	When the distribution truck k starts from the petrol depot d and passes through the route, the variable is 1; otherwise, it is 0,
	When the serving petrol depot of petrol station j is adjusted from g to h after the petrol distribution network optimization, the variable is 1; otherwise, it is 0,
	When depot i agrees to join the cooperative petrol distribution network, the variable is 1; otherwise, it is 0,