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

Table 10

Predicted monthly attenuations of PQI for three representative lines of the main trunk highway in Hunan Province.

	Monthly attenuation of measured and predicted PQI
	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	—		—		0.1267	0.1267
2013/month	0.1725	0.1725	0.1367	0.1367	0.3025	0.3102
2014/month	0.4567	0.4555	0.3700	0.3743	0.2467	0.3126
2015/month	0.4275	0.4297	0.3700	0.3592	0.4692	0.3151
2016/month	0.4067	0.4050	0.3367	0.3447	0.2367	0.3177
2017/month	0.3825	0.3824	0.3325	0.3307	0.3208	0.3202
2018/month		0.3608		0.3174		0.3228
2019/month		0.3403		0.3045		0.3254