European field data have shown that vehicle rollovers do not usually occur in isolation. More frequently, they occur as part of more complex accident sequences involving multiple impacts. In most cases, the rollover event does not occur at the beginning of the crash sequence. Instead, the rollover is usually preceded by one or more impacts.

This paper describes a detailed analysis of multiple impact crashes that involve rollover and considers the nature, characteristics and sequencing of the impacts and rollover events involved.