Simultaneous Generation of Optimum Pavement Clusters and Associated Performance Models

Table 2

Descriptive statistics for the continuous variables.

Variable	Category	Dummy variable	Number of observations	Percent
System ID	IR	-	4,622	31.6
	NHS	nhs	5,063	34.6
	STP	stp	4,952	33.8
Number of Lanes	1	-	8,450	57.7
	2	lane=2	5,612	38.3
	≥ 3	lane≥3	575	3.9
Prioritization Category	1	-	5,004	34.2
	2	category =2	3,181	21.7
	3	category =3	3,118	21.3
	4	category =4	1,558	10.6
	5	category =5	1,776	12.1
Functional Class	1	-	4,695	32.1
	2	f_class = 2	107	0.7
	3	f_class = 3	5,106	34.9
	4	f_class = 4	2,604	17.8
	5	f_class = 5	1,830	12.5
	6	f_class = 6	251	1.7
	7	f_class = 7	44	0.3

Note: IR, interstate route; NHS, national highway system; STP, Surface Transportation Program.