Impact of Urban Undersea Tunnel Longitudinal Slope on the Visual Characteristics of Drivers

Table 3

The mean value of the average fixation time and visual lobe under different longitudinal slopes of the uphill and downhill sections.

Longitudinal slope (%)	Uphill				Downhill
	Average fixation time (ms)		Visual lobe (°)		Average fixation time (ms)		Visual lobe (°)
	Mean	Standard deviation	Mean	Standard deviation	Mean	Standard deviation	Mean	Standard deviation
0.30	314.405	20.351	3.946	0.308	315.071	26.067	2.934	0.264
1.302	298.414	18.802	4.010	0.281	290.897	18.802	3.054	0.278
2.15	275.190	17.288	4.054	0.331	263.190	17.288	3.145	0.381
2.23	272.103	17.221	4.192	0.424	265.103	17.221	3.186	0.413
2.47	267.987	18.467	4.650	0.475	281.021	18.466	3.234	0.449
2.88	279.043	24.766	4.674	0.538	290.043	24.766	3.453	0.500
3.45	305.502	24.674	4.109	0.522	325.969	35.785	3.254	0.487
3.50	313.026	33.121	4.010	0.508	327.060	33.120	3.220	0.533
3.90	329.418	42.814	3.604	0.450	341.751	52.432	3.039	0.482
4.00	330.981	70.542	3.621	0.306	345.014	70.542	2.966	0.371
Average	298.607		4.087		304.512		3.148