Prediction Method of Asphalt Pavement Performance and Corrosion Based on Grey System Theory

Table 8

The predictive value and the accuracy test results of skid resistance.

Index	8	9	10	11	12	13	14	15	16	17	18	19	20
Monitoring value	42.1	38.5	38.4	36.9	34.1	31.2	30.9	28.1	26.9	26.5	26.2	25.9	25.7
Predictive value	41.4	39.4	37.5	35.7	33.9	32.3	30.7	29.2	27.8	26.4	25.1	23.9	22.7
Residual/	1.66	2.33	2.34	3.25	0.59	3.52	0.65	3.91	3.35	0.38	4.2	7.72	8.09
Prediction accuracy	Gray absolute correlation degree