Association between Truck Crashes due to Mechanical Failure and Truck Age

Table 1

Truck types and distribution.

Truck type	Count	Percentage
Truck-tractor (cab only, or with any number of trailing unit)	14,015	64.51
Single-unit straight truck or cab-chassis (26,000 lbs + GVWR)	3,024	13.92
Single-unit straight truck or cab-chassis (19,500–26,000 lbs. GVWR)	1,167	5.37
Single-unit straight truck or cab-chassis (10,000–19,500 lbs. GVWR)	1,364	6.28
Medium/heavy pickup (10,000 lbs. + GVWR)	1,265	5.82
Single-unit straight truck or cab-chassis (GVWR unknown)	439	2.02
Unknown medium/heavy truck type	89	0.41
Camper or motorhome, unknown truck type	85	0.39
Medium/heavy truck based motorhome	120	0.55
Step van (10,000 lbs. GVWR)	74	0.34
Unknown if single unit or combination medium truck heavy truck (26,000 lbs. + GVWR)	47	0.22
Unknown if single unit or combination medium truck (10,000–26,000 lbs. GVWR)	28	0.13
Unknown truck type (light/medium/heavy)	9	0.04
Total	21,726	100.00