A Binary Cuckoo Search for Combinatorial Optimization in Multiyear Pavement Maintenance Programs

Table 3

Normal distribution parameters of performance degradation in different situations.

Section locations	M&R activities in the previous year	Performance degradation
Pavement sections in tunnels	Doing nothing	= 4.89	= 0.1
	Preventive maintenance	= 3.76
	Rehabilitation	= 2.05
Pavement sections in bridges	Doing nothing	= 5.21
	Preventive maintenance	= 3.02
	Rehabilitation	= 2.05
Pavement sections in other road locations	Doing nothing	= 4.32
	Preventive maintenance	= 3.16
	Rehabilitation	= 2.87