Influences of Exit Advance Guide Signs on the Trajectory and Speed of Passenger Cars in Highway Tunnels

Table 2

Test scheme.

Working condition	1	2	3	4	5	6
Spacing (m)	300	300	350	350	400	400
Sign location	Top	Top and sidewall	Top	Top and sidewall	Top	Top and sidewall

Spacing is the distance from tunnel exit to starting point of ramp entry deceleration lane.