Class	Safety risk parameters
Equipment factor (Vehicle and tank factors)	1) Speed	14) Liquid level	27) Property of the filling media
	2) Newness of the vehicle	15) Internal diameter	28) Container corrosion allowance
	3) Operating status of the indicator lamp	16) Total length of tank	29) Cylinder material
	4) Closed condition of pipe fittings	17 Weight	30) Internal temperature
	5) Tire pressure status	18) Length	31) Pressure
	6) Chassis and mobile equipment reliability	19) Wall thickness	32) Filling situation
	7) Appearance	20) Quantity	33) Hydrogen sulfide concentration
	8) Carrying documents and tools with the car	21) Model	34) Mezzanine vacuum level
	9) Design service life	22) Filling capacity (medium storage capacity)	35) Inherent reliability of safety release devices
	10) Chassis type	23) Total volume	36) Reliability of pipeline use
	11) Design the speed limits	24) Reliability of safety accessories for use	37) Reliability of container use
	12) Pipeline materials	25) Reliability of loading and unloading accessories	—
	13) Vehicle posture	26) Charging station compliance	—
Road factor	38) Road segment accident susceptibility	40) Number of lanes	42) Road surface friction coefficient
Road factor	39) Slope	41) Visual distance	43) Turning radius
Demic factor	44) Continuous driving hours	46) Personnel qualification	47) Driving experience
Demic factor	45) Fatigue level	—	—
Environment factor	48) Sensitive date	51) Visibility	54) Functional areas
	49) Traffic congestion index	52) Lighting conditions	55) Geographic conditions
	50) Environmental humidity	53) Population density	56) Hydrological conditions