HEAVY TRUCK CAB SAFETY STUDY. FINAL REPORT
Nearly 1000 occupants of large trucks die each year in traffic accidents. Examination of yearly trends shows about a 25% decline in tractor-driver fatalities from 674 in 1984 to 508 in 1987. Over that same period of time, restraint use by tractor drivers involved in fatal accidents increased from 9.6% to 37.3%. The primary factors associated with tractor driver fatalities remain the same as identified in earlier studies. About 80% are single vehicle accidents. Rollover is identified as the most harmful event in 41.4% and frontal impact is the most harmful event in 40.3%. Thirty-four percent of the fatally-injured tractor drivers were ejected and 21.5% required extrication. Fire on the truck was associated with 16.2% of the tractor driver fatalities. The recent TIFA data on restrained truck drivers indicates that restraint use reduces the probability of fatality by 77%. However, this estimate must be tempered by the evidence of over-reporting of restraint use on police accident reports. Information obtained through a review of 186 National Transportation Safety Board (NTSB) reports on truck driver fatalities in eight states indicated that there was not sufficient occupant survival space in about 65% of the collisions examined. Forty-two percent were judged to be not survivable because of the severity of the impact. Restraint use alone appears sufficient to alter the outcome of only about 27%. Cab structural modifications sufficient to maintain adequate survival space, particularly in rollover, will be required in order to address an additional 23% that appeared survivable.
- Sponsored by the Trucking Research Institute, ATA Foundation, Inc., 2200 Mill Road, Alexandria, Virginia 22314-4627.
University of Michigan Transportation Research Institute2901 Baxter Road
Ann Arbor, MI United States 48109-2150
- Campbell, K L
- Sullivan, K P
- Publication Date: 1991-11
- Features: Appendices; Figures; References; Tables;
- Pagination: 55 p.
- TRT Terms: Cabs (Vehicle compartments); Crashworthiness; Ejection; Entrapment; Fatalities; Fires; Frontal crashes; Heavy duty trucks; Injury severity; Restraint systems; Rollover crashes; Single vehicle crashes; Survival; Tractor trailer combinations; Trend (Statistics); Truck crashes; Trucks
- Old TRIS Terms: Impact severity
- Subject Areas: Highways; Motor Carriers; Safety and Human Factors; Vehicles and Equipment; I81: Accident Statistics; I91: Vehicle Design and Safety;
- Accession Number: 00716846
- Record Type: Publication
- Source Agency: National Highway Traffic Safety Administration
- Report/Paper Numbers: UMTRI-91-28, HS-041 430
- Files: HSL, TRIS, USDOT
- Created Date: Feb 21 1996 12:00AM