This chapter, from a comprehensive text on occupant and vehicle responses in rollovers, considers the characteristics of on-road rollovers. The authors discuss those rollovers that involve passenger vehicles and feature one of two scenarios. The first is the loss of directional control (vehicle heading control) of a vehicle, which often involves an off-road path followed by steering input to re-enter the roadway that is then followed with excessive corrective steering leading to loss of control. The second scenario involves transient cornering maneuvers that prompt the vehicle roll mode; the authors note that suspension characteristics are very significant in this type of rollover. The authors review the data from a test program that included maneuvers through an obstacle avoidance course. This program included tests in which the vehicle successfully went through the course as well as tests where intentional vehicle tip-ups occurred. Other topics covered include driver input data (steering wheel angle amplitude and steering wheel rate), vehicle response data (lateral acceleration, yaw rate, body roll angle, roll rate), analytical models of the rollover trip phase, estimating the energy dissipation or transfers and lateral impulses, and the effects of wheel rim gouging in the roadway surface. The authors conclude that available data demonstrates that severe steering inputs are required to initiate vehicle on-road rollovers.


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  • Accession Number: 00985052
  • Record Type: Publication
  • ISBN: 0768012953
  • Report/Paper Numbers: PT-101
  • Files: TRIS
  • Created Date: Jan 10 2005 12:00AM