Wheelchair securement designs for fixed route, large accessible transit vehicles (LATVs) often create difficulties for passengers who use wheelchairs and operational inefficiencies for public transit agencies. Recent innovations in wheelchair securement technology for LATVs may reduce these challenges. This field study builds on a recent lab study that used a full-scale LATV simulation apparatus to address similar knowledge gaps. The current study used a mixed-methods approach to explore the usability of two newer wheelchair securement systems currently installed in LATVs in Buffalo, NY: a 3-point, forward-facing (3P-FF) securement system and a semi-automated, rear-facing (SA-RF) securement system. Three groups of wheelchair users (manual wheelchair [MWC], power wheelchair [PWC], and scooter [SC] users; n = 40) completed a pre-study interview, four trips on the LATVs and accompanying surveys, and a final interview. Using multiple usability rating scales, findings indicated clear differences in ratings of difficulty and acceptability between securement systems by wheelchair user group, with the SA-RF outperforming the 3P-FF on most usability measures for MWC and PWC users. SC users consistently rated both securement systems as more difficult to use and the SA-RF securement as less acceptable than MWC and PWC users.
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