Evacuation Traffic Management under Diffusion of Toxic Gas Based on an Improved Road Risk Level Assessment Method

Table 8

Road risk level/weight coefficient according to traditional method.

Upstream zone	Downstream zone
	#1	#2	#3	#4	safe area
#1	8/9	7/8	6/7	5/6	4/5
#2	7/8	6/7	5/6	4/5	3/4
#3	6/7	5/6	4/5	3/4	2/3
#4	5/6	4/5	3/4	2/3	1/2
safe area	4/5	3/4	2/3	1/2	0/1