Commercial Value Assessment of “Grey Space” under Overpasses: Analytic Hierarchy Process

Table 4

Matrix of environment criteria.

Environment	B1: noise protection	B2: air pollution	B3: existence of trees and green spaces
B1: noise protection	1	0.5	0.5
B2: air pollution	2	1	0.5
B3: the existence of trees and green spaces	2	2	1
B4: clean environment	8	7	2