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

Table 2

Road risk level according to traditional model.

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