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Appl Ergon ; 118: 104283, 2024 Jul.
Article in English | MEDLINE | ID: mdl-38608624

ABSTRACT

Automobile seat belts reduce the risk of injuries and fatalities resulting from a crash. As seat belts become more prevalent on large school buses, characterizing the capabilities of children to operate the unlatching mechanism of a seat belt is crucial to ensure the post-crash safety of young passengers. This study evaluated the strength capabilities of children and their abilities to unlatch a school bus seat belt when a school bus is in both the upright and rolled-over orientations. Push force exertions on a seat belt buckle push button were measured and compared to the seat belt assembly release force requirements specified in Federal Motor Vehicle Safety Standard (FMVSS) No. 209. Results of the study suggested that children do not have the strength to exert the maximum force of 133 N to release a seat belt assembly as specified in FMVSS No. 209; however, most children could unlatch a typical school bus seat belt assembly in the upright and rolled-over orientations.


Subject(s)
Motor Vehicles , Schools , Seat Belts , Humans , Child , Male , Female , Equipment Design , Accidents, Traffic/prevention & control , Adolescent , Ergonomics
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