Effects of In-Vehicle Navigation on Perceptual Responses and Driving Behaviours of Drivers at Tunnel Entrances: A Naturalistic Driving Study

Table 6

Statistical results of the speed difference in zones.

	Control		In-vehicle navigation		p
	mean	sd	mean	sd
Zone 1	-2.86	3.17	-4.58	3.98	0.004
Zone 2	-4.81	4.13	-4.32	3.41	0.02
Zone 3	-1.84	3.74	-2.03	3.70	0.36
Zone 4	0.45	3.54	0.03	3.39	0.22