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

Table 5

Monthly attenuations of PCI and PQI for three typical representative lines of highways in Hunan Province.

	Monthly attenuation of PCI			Monthly attenuation of PQI
	Line 1	Line 2	Line 3	Line 1	Line 2	Line 3
2012/month	—	—	0.1467	—	—	0.1267
2013/month	0.1550	0.2008	0.4075	0.1725	0.1367	0.3025
2014/month	0.6308	0.5583	0.4008	0.4567	0.3700	0.2467
2015/month	0.5950	0.3417	0.5542	0.4275	0.3700	0.4692
2016/month	0.5417	0.4483	0.3358	0.4067	0.3367	0.2367
2017/month	0.5058	0.3417	0.4133	0.3825	0.3325	0.3208