Risk Analysis and Route Optimization of Dangerous Goods Transportation Based on the Empirical Path Set

Table 1

Basic traffic accident rate of dangerous goods transportation.

Area	Road class		Average truck traffic accident rate (once/10^8 veh·km)
Urban	Expressway, class I highway		4.485
	Class II highway		6.512
	Class III and IV highway		3.485
	Substandard highway	Double lane	2.458
	Urban road	Undivided lane	3.925
		Double lane	3.511
		Multilane	5.058
		One-way street	3.935
		Undivided lane	5.645
Rural	Expressway, class I highway		1.330
	Class II highway		1.646
	Class III and IV highway		0.617
	Substandard highway	Double lane	1.754
		Undivided lane	2.956