Optimization Model of Network-Level Pavement Maintenance Decision considering User Travel Time and Vehicle Fuel Consumption Costs

Table 2

Condition combinations of the expressway asphalt pavement performance.

Combination	PCI	RQI	SRI	PSSI
1	Good	Good	Sufficient	Sufficient
2	Fair	Good	Sufficient	Sufficient
3	Poor	Good	Sufficient	Sufficient
4	Good	Fair	Sufficient	Sufficient
5	Fair	Fair	Sufficient	Sufficient
6	Poor	Fair	Sufficient	Sufficient
7	Good	Poor	Sufficient	Sufficient
8	Fair	Poor	Sufficient	Sufficient
9	Poor	Poor	Sufficient	Sufficient
10			Insufficient	Sufficient
11				Insufficient