Causation Analysis of Hazardous Material Road Transportation Accidents by Bayesian Network Using Genie

Table 1

Variables of Hazmat road transportation accidents.

Factors	Variables	Variables description	Discretization	Frequency	Percentage
Hazmat factors	Hazmat categories	Explosives	1	27	3.20%
		Toxic gases	2	158	18.90%
		Flammable liquids	3	429	51.10%
		Corrosives	4	121	14.40%
		others	5	104	12.40%
	Quantity of Hazmat	<10	1	127	15.10%
		10-24	2	284	33.80%
		25-39	3	358	42.70%
		≥40	4	70	8.40%
Driver factors	Age	24-35	1	144	17.20%
		36-45	2	644	76.70%
		46-60	3	51	6.10%
	Behaviors	Inappropriate driving	1	13	1.50%
		Speeding	2	36	4.30%
		Fatigue driving	3	20	2.40%
		Normal driving	4	770	91.80%
Location factors	Accident location	Group one	1	360	42.90%
		Group two	2	336	40.00%
		Group three	3	59	7.00%
		Group four	4	84	10.10%
	Special section	Intersection	1	18	2.10%
		Freeway service areas	2	50	6.00%
		Toll stations	3	78	9.30%
		Gas stations	4	23	2.70%
		Normal	5	670	79.90%
	Road surface	Dry	1	794	94.60%
		Wet	2	45	5.40%
Environment factors	Season	Spring	1	227	27.10%
		Summer	2	258	30.70%
		Autumn	3	186	22.20%
		Winter	4	168	20.00%
	Weekly distribution	Weekends	1	198	23.60%
		Weekdays	2	641	76.40%
	Weather	Sunny	1	202	24.10%
		Cloudy	2	347	41.40%
		Rainy & snow	3	268	31.90%
		Fog & haze	4	22	2.60%
	Visibility	dawn	1	94	11.20%
		day	2	409	48.70%
		dusk	3	60	7.20%
		dark	4	276	32.90%
Vehicle factors	Total vehicle involved in accident	1	1	503	59.90%
		2	2	276	32.90%
		3	3	31	3.70%
		≥4	4	29	3.50%
	Type of vehicle	Bus & Truck	1	13	1.55%
		Private cars & Truck	2	42	5.01%
		Non-motor & Truck	3	11	1.31%
		Bus&Private cars&Truck	4	10	1.19%
		Trucks	5	763	90.94%
Accidents factors	Accident type	Rear-end	1	189	22.50%
		Sideswipe	2	20	2.40%
		Rollover	3	340	40.50%
		Collision	4	145	17.30%
		Vehicle failure	5	145	17.30%
	Accident consequence	Explosion	1	25	3.00%
		Fire	2	96	11.40%
		Spill	3	682	81.30%
		Non-spill	4	36	4.30%
	Severity of accident	No injury	1	656	78.19%
		Severe injury	2	139	16.57%
		Fatality	3	44	5.24%