Fatigue Driving Prediction on Commercial Dangerous Goods Truck Using Location Data: The Relationship between Fatigue Driving and Driving Environment

Table 1

Predictor variables.

Group	Variable description
Travel time (T)	T1: 0 am and 5 am
	T2: 5 am and 9 am
	T3: 9 am and 5 pm
	T4: 5 pm and 10 pm
	T5: 10 pm and 12 pm
Day of week (W)	W1: weekdays except Friday
	W2: weekends with Friday
Road type (R)	R1: urban roads
	R2: highway except the freeway
	R3: freeway
Continuous driving time (C)	C1: average continuous driving time
	C2: longest continuous driving time
Average velocity (V)	V1: 0 km/h–40 km/h
	V2: 40 km/h–60 km/h
	V3: 60 km/h–80 km/h
	V4: over 80 km/h (has only a lower bound)
Overall mileage (M)	M: mileage traveled per day