Table 9. One-way ANOVA for the running speed.

Forest road structure	Slope	Location, Alignment	DF	Sum of square	Mean square	F-value	Prob>F
Distance of straight	Uphill	-	3	9.079	3.026	0.633	0.596
	Downhill	-	3	23.014	7.671	3.129	0.031
Internal angle	Uphill	Valley	2	73.362	36.681	10.729	0.000
		Ridge	2	51.499	25.750	2.912	0.062
	Downhill	Valley	2	81.366	40.683	12.298	0.000
		Ridge	2	31.337	15.669	2.457	0.094
Radius of curve	Uphill	Valley	2	63.681	31.841	8.738	0.001
		Ridge	2	91.301	45.650	5.574	0.006
	Downhill	Valley	2	84.640	42.320	13.101	0.000
		Ridge	2	85.083	42.541	7.740	0.001
Longitudinal gradient	Uphill	Straight	2	1.643	0.821	0.145	0.866
		Curve	2	25.808	12.904	1.823	0.166
	Downhill	Straight	2	4.066	2.033	0.774	0.465
		Curve	2	8.665	4.332	0.723	0.488