Operator inattention contributed to 664 accidents, 55 deaths, and 383 injuries.
Operator inexperience led to 612 accidents, 56 deaths, and 343 injuries.
Improper lookout caused 578 accidents, 28 deaths, and 409 injuries.
Excessive speed caused 418 accidents, 32 deaths, and 345 injuries.
Machinery failure led to 373 accidents, 19 deaths, and 151 injuries.
Navigation rules violations caused 316 accidents, 26 deaths, and 220 injuries.
Alcohol use was involved in 296 accidents, 115 deaths, and 260 injuries.
Weather conditions contributed to 244 accidents, 62 deaths, and 95 injuries.