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Investigation of wheelchair instability during transport in large accessible transit vehicles

This study aims to better understand wheelchair instabilities in large accessible transit vehicles (LATVs), particularly related to the disuse and misuse of wheelchair tiedown and occupant restraint systems (WTORS). Through a retrospective review of video surveillance records, instances of wheelchair-related adverse events were analyzed, revealing high rates of instability and suboptimal WTORS use. The study highlights the importance of proper WTORS configurations and techniques in preventing adverse events and enhancing safety for wheelchair passengers on LATVs.

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Investigation of wheelchair instability during transport in large accessible transit vehicles

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  1. Investigation of wheelchair instability during transport in large accessible transit vehicles Zdravko Salipur, MEng; Karen Frost, PhD; Gina Bertocci, PhD, PE

  2. Aim • Better understand wheelchair instabilities related to wheelchair tiedown and occupant restraint system (WTORS) disuse and misuse on large accessible transit vehicles (LATVs). • Relevance • LATVs may be less safe for wheelchair-seated passengers than for non-wheelchair-using passengers. • Transit provider practices vary regarding use of WTORSs. Recent research suggests high levels of WTORS disuse and misuse.

  3. Methods • We retrospectively reviewed 295 video surveillance records of wheelchair passenger trips on LATVs. • Quantified and categorized disuse and misuse based on WTORS configurations. • Categorized wheelchair and wheelchair passenger instability based on severity, type, and direction. • Examined 3 adverse events involving severe wheelchair and/or passenger instability in detail.

  4. Results • 20.3% of records involved wheelchair-related adverse events. • 95% minor instabilities. • 5% severe instabilities. • Scooters most unstable. • WTORS not used in most cases. • Often lap belt misused to secure wheelchair rather than passenger and shoulder belt never used.

  5. Conclusions • Wheelchair-related adverse events can occur during normal LATV driving maneuvers. • Adverse events might have been prevented by: • Using all 4 tiedowns. • Using lap and shoulder belts. • Applying wheelchair brakes. • Turning off power wheelchairs.

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