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

Table 9

Monthly attenuation prediction of three typical expressway pavements of the Hunan main highway.

	Monthly attenuation of measured and predicted PCI
	Line 1 measured value	Line 1 predicted value	Line 2 measured value	Line 2 predicted value	Line 3 measured value	Line 3 predicted value
2012/month	—		—		0.1467	0.1467
2013/month	0.1550	0.1150	0.2008	0.2008	0.4075	0.4326
2014/month	0.6308	0.6338	0.5583	0.5108	0.4008	0.4274
2015/month	0.5950	0.5878	0.3417	0.4461	0.5542	0.4223
2016/month	0.5042	0.5452	0.4483	0.3896	0.3358	0.4172
2017/month	0.5058	0.5057	0.3417	0.3402	0.4133	0.4122
2018/month		0.4690		0.2971		0.4073
2019/month		0.4350		0.2595		0.4024