Off-Ramp Vehicle Mandatory Lane-Changing Duration in Small Spacing Section of Tunnel-Interchange Section Based on Survival Analysis

Table 3

Influencing factors and variable assignments.

Category	Influencing factors	Variable assignment
Vehicle	Vehicle type (X1)	X 10 = small, X11 = medium
Road	Distance between tunnel exit and deceleration lane upper starting point (X2)	X 20 = 300 m, X21 = 400 m, X22 = 500 m, X23 = 600 m
	Tunnel type (X3)	X 30 = small & medium, X31 = long & extra-long
	Ramp type (X4)	X 40 = direct, X41 = parallel
Traffic condition	Road service level (X5)	X 50 = first service level (550 pcu/h), X51 = second service level (1200 pcu/h), X52 = third service level (1550 pcu/h)
	Exit advance guide sign in tunnel (X6)	X 60 = no setting, X61 = setting