Monthly Attenuation Prediction for Asphalt Pavement Performance by Using GM (1, 1) Model

Table 7

Daily attenuations of PCI and PQI for three typical representative lines of main trunk highways in Hunan Province.

	Daily attenuation of PCI			Daily attenuation of PQI
	Line 1	Line 2	Line 3	Line 1	Line 2	Line 3
2012/daily	—	—	0.0048	—	—	0.0042
2013/daily	0.0051	0.0066	0.0134	0.0057	0.0045	0.0099
2014/daily	0.0207	0.0184	0.0132	0.0150	0.0122	0.0081
2015/daily	0.0196	0.0112	0.0182	0.0141	0.0122	0.0154
2016/daily	0.0178	0.0147	0.0110	0.0134	0.0111	0.0078
2017/daily	0.0166	0.0112	0.0136	0.0126	0.0109	0.0105