Drivers’ Eye Movement Characteristics in a Combined Bridge-Tunnel Scenario on a Mountainous Urban Expressway: A Realistic Study

Table 1

Experiment-road information.

Designation	Number	Length (m)	Specific location	Location	Distance (m)
Nanchang tunnel	T1	1200	Entrance	T1-1	0∼50
			Intermediate	T1-2	400∼800
			Exit	T1-3	1150∼1250
Caiyuanba Yangtze River bridge	B1	1000	Bridge-head	B1-1	1300
			Intermediate	B1-2	1700
			Bridge-tail	B1-3	1900
Caiyuanba ramp	R	833	Intermediate	R-1	2300
			Intermediate	R-2	2600
Zeng-Jiayan tunnel	T2	2090	Entrance	T2-1	2850∼2950
			Intermediate	T2-2	3300∼4700
			Exit	T2-3	5000∼5100
Zeng-Jiayan Jialing River bridge	B2	550	Intermediate	B2-1	5300
Liujiatai tunnel	T3	2900	Entrance	T3-1	5550∼5650
			Intermediate	T3-2	6000∼8000
			Exit	T3-3	8650∼8750
			200 m after tunnel exit	T3-4	8900
			500 m after tunnel exit	T3-5	9200