This technical report describes the sample design, data collection, data coding, weighting, estimation methods, and findings of the Medium-Truck Special Study (MTSS), the purpose of which is to identify critical reasons for the critical events and causal factors in fatal crashes and to assess if crash avoidance technologies could have affected the crashes and injury severity of medium-truck crashes. Forty-two percent of the medium trucks in MTSS were pickup trucks, and the remaining 58 percent were single-unit straight truck or cab-chassis medium trucks. The Critical Reason for the Critical Event was assigned to a medium truck in 42 percent of the MTSS fatal crashes. In 56 percent of the total estimated vehicles involved in the fatal MTSS crashes, Forward Collision Warning and Automatic Emergency Braking, if available and not disabled, were deemed to have possibly or probably been effective in reducing the severity and/or preventing the crash. The braking technologies showed much higher potential than lane (18%) and blind spot (less than 1%) technologies.
Results identify three to seven statistically significant risk factors from among 13 selected for the models. These included: seat belt use, alcohol/d...
Researchers want to better understand the relationships between roadside inspection data and safety performance data for large trucks. The research wi...
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United States Department of Transportation
[PDF-3.32 MB]
