Table 3: Significant contributory factors to truck crash severity.

Degree of Impact	Factors
High (odds ratio estimate >9)	CMV driver safety in use
Medium (3< odd ratio estimate <5)	No of Vehicle
	Rollover
	Occupant ejection
	Sign of fatigue
Low (odd ratio estimate <3)	Gender
	violation record
	Posted speed limit
	Head-on collision
	Driver distraction