Research on the Prediction Model of the Friction Coefficient of Asphalt Pavement Based on Tire-Pavement Coupling

Table 9

The precision test for the predictive model of the pavement friction coefficient.

No.	Macrotexture (mm)	Tire speed (km/h)	Microtexture (mm)	Tire load (N)	Predictive value (/)	Measured value (/)	Error (-)	Relative error (%)
1	0.556	20	0.411	200	0.442	0.41	−0.032	−7.80
2	0.569	20	0.428	200	0.459	0.40	−0.059	−14.75
3	1.293	20	0.320	200	0.521	0.50	−0.021	−4.20
4	1.917	20	0.411	200	0.604	0.61	0.006	0.98
5	1.900	20	0.320	200	0.604	0.53	−0.074	−13.96
6	0.556	10	0.411	200	0.486	0.52	0.034	6.54
7	0.556	30	0.411	200	0.357	0.38	0.023	6.05
8	0.569	10	0.428	200	0.492	0.51	0.018	3.53
9	0.569	30	0.428	200	0.382	0.34	−.0420	−12.35
10	0.556	30	0.320	200	0.287	0.29	0.003	1.03
11	1.609	10	0.411	200	0.654	0.66	0.006	0.92
12	1.353	10	0.428	200	0.606	0.65	0.044	6.77
13	1.353	30	0.428	200	0.502	0.45	−0.052	−11.56
14	1.293	30	0.320	200	0.438	0.40	−0.038	−9.50
15	1.917	10	0.411	200	0.647	0.66	0.013	1.97
16	2.123	10	0.428	200	0.633	0.64	0.007	1.09
17	1.900	10	0.320	200	0.648	0.66	0.012	1.82
18	0.556	20	0.411	250	0.417	0.40	−0.017	−4.25
19	0.569	20	0.428	250	0.437	0.39	−0.047	−12.05
20	0.559	20	0.320	150	0.355	0.32	−0.035	−10.94
21	0.559	20	0.320	250	0.332	0.37	0.038	10.27
22	1.609	20	0.411	250	0.590	0.51	−0.080	−15.69
23	1.353	20	0.428	250	0.570	0.54	−0.030	−5.56
24	1.917	20	0.411	150	0.582	0.55	−0.032	−5.82
25	1.917	20	0.411	250	0.631	0.59	−0.041	−6.95
26	2.123	20	0.428	150	0.574	0.53	−0.044	−8.30
27	2.123	20	0.428	250	0.616	0.61	−0.006	−0.98
28	1.900	20	0.320	150	0.582	0.56	−0.022	−3.93
29	1.900	20	0.320	250	0.631	0.62	−0.011	−1.77
30	0.559	20	0.320	200	0.338	0.47	0.132	28.09
31	1.609	20	0.411	200	0.615	0.46	−0.155	−33.70
32	1.353	20	0.428	200	0.565	0.45	−0.115	−25.56
33	2.123	20	0.428	200	0.590	0.45	−0.140	−31.11
34	0.559	10	0.320	200	0.410	0.54	0.130	24.07
35	1.609	30	0.411	200	0.567	0.41	−0.157	−38.29
36	1.293	10	0.320	200	0.566	0.45	−0.116	−25.78
37	1.917	30	0.411	200	0.572	0.45	−0.122	−27.11
38	1.900	30	0.320	200	0.571	0.41	−0.161	−39.27
39	1.293	20	0.320	250	0.516	0.49	−0.026	−5.31
40	0.556	50	0.411	200	0.204	0.34	0.136	40.00
41	0.556	70	0.411	200	0.176	0.22	0.044	20.00
42	0.569	50	0.428	200	0.209	0.33	0.121	36.67
43	0.569	70	0.428	200	0.176	0.22	0.044	20.00
44	0.559	50	0.320	200	0.196	0.31	0.114	36.77
45	0.559	70	0.320	200	0.175	0.25	0.075	30.00
46	1.609	50	0.411	200	0.508	0.38	−0.128	33.68
47	1.609	70	0.411	200	0.382	0.34	−0.042	−12.35
48	1.353	50	0.428	200	0.395	0.37	−0.025	−6.76
49	1.353	70	0.428	200	0.265	0.29	0.025	8.62
50	1.293	50	0.320	200	0.263	0.35	0.087	24.86
51	1.293	70	0.320	200	0.197	0.32	0.123	38.44
52	1.917	50	0.411	200	0.556	0.41	−0.146	−35.61
53	1.900	70	0.320	200	0.421	0.35	−0.071	−20.26