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

Table 6

The orthogonal test of pavement friction coefficient.

Test no.	Macrotexture	Tire load	Tire pressure	Tire speed	Microtexture	Combination of factors	Friction coefficient
1	A2	B2	C3	D1	E3	A2B2C3D1E3	0.588
2	A3	B2	C2	D3	E1	A3B2C2D3E1	0.488
3	A2	B1	C3	D3	E1	A2B1C3D3E1	0.44
4	A1	B2	C1	D3	E3	A1B2C1D3E3	0.353
5	A3	B3	C3	D3	E3	A3B3C3D3E3	0.536
6	A2	B3	C2	D1	E1	A2B3C2D1E1	0.556
7	A1	B3	C2	D2	E3	A1B3C2D2E3	0.411
8	A2	B3	C1	D3	E2	A2B3C1D3E2	0.491
9	A2	B1	C1	D2	E3	A2B1C1D2E3	0.53
10	A1	B1	C1	D1	E1	A1B1C1D1E1	0.405
11	A3	B3	C1	D2	E1	A3B3C1D2E1	0.546
12	A3	B2	C1	D1	E2	A3B2C1D1E2	0.623
13	A3	B1	C3	D2	E2	A3B1C3D2E2	0.565
14	A2	B2	C2	D2	E2	A2B2C2D2E2	0.541
15	A1	B3	C3	D1	E2	A1B3C3D1E2	0.456
16	A1	B2	C3	D2	E1	A1B2C3D2E1	0.363
17	A1	B1	C2	D3	E2	A1B1C2D3E2	0.34
18	A3	B1	C2	D1	E3	A3B1C2D1E3	0.62