Tripped rollover (phase A).
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2009-08-01
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Alternative Title:U15 : tripped rollover (phase A)
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Edition:Final report; Mar. 2009-Aug. 2009
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Abstract:The Federal Highway Administration (FHWA) has expressed interest in learning more about pavement drop-offs at the edge of roadways and their relationship with the roll stability of heavy vehicles. Statistics kept by the National Highway Traffic Safety Administration (NHTSA) and other entities have shown that more than half of all heavy vehicle rollovers are associated with a run-off-road crash. Furthermore, the majority are “tripped;” that is, the truck rolled over because it ran over a drop-off or encountered a curb or other obstacle. Previous rollover research by the Heavy Truck Rollover Consortium [Knee et al., 2005; NTRCI, 2009a; NTRCI, 2009b], like nearly all previous full-scale rollover experiments, has focused on the “untripped” rollover; i.e., those in which the truck executes a maneuver (such as rounding a corner too quickly) and rolls on essentially level pavement. This report is the first publication to describe quantitative experiments in heavy vehicle behavior in roadway departure recoveries. The long-term objectives of the recommended “tripped” rollover research are to: • Develop and validate a model that explains how and when tripped rollovers occur and the influence of key components • Develop recommendations and guidelines for reducing the likelihood of tripped rollovers, including recommendations for: o Highway and pavement design o Vehicle suspension and dynamics design o Stability control algorithms o Driver recovery procedures. The objective for the experiments described in this report was to: • Provide typical results from which further experiments can be designed • Establish a dynamic vehicle model that can be enhanced in future years • Attract participation from additional interested parties.
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