An on-road study of sleepiness in split shifts among city bus drivers

Accident; Analysis and Prevention
Anna AnundGöran Kecklund

Abstract

Bus drivers often work irregular hours or split shifts and their work involves high levels of stress. These factors can lead to severe sleepiness and dangerous driving. This study examined how split shift working affects sleepiness and performance during afternoon driving. An experiment was conducted on a real road with a specially equipped regular bus driven by professional bus drivers. The study had a within-subject design and involved 18 professional bus drivers (9 males and 9 females) who drove on two afternoons; one on a day in which they had driven early in the morning (split shift situation) and one on a day when they had been off duty until the test (afternoon shift situation). The hypothesis tested was that split shifts contribute to sleepiness during afternoon, which can increase the safety risks. The overall results supported this hypothesis. In total, five of the 18 drivers reached levels of severe sleepiness (Karolinska Sleepiness Scale ≥8) with an average increase in KSS of 1.94 when driving in the afternoon after working a morning shift compared with being off duty in the morning. This increase corresponded to differences observed between shift workers starting and ending a night shift. The Psychomotor Vigilance ...Continue Reading

Citations

May 30, 2019·New Solutions : a Journal of Environmental and Occupational Health Policy : NS·Sophia Sidhu, Grace An
Jun 27, 2019·International Journal of Environmental Research and Public Health·Art van SchaaijkMonique Frings-Dresen
Aug 21, 2020·Applied Ergonomics·Sally MaynardRoger Haslam
Oct 24, 2019·Sleep Medicine Clinics·Damien LégerGabriela Caetano
Jan 1, 2022·Journal of Biological Rhythms·Diane B BoivinAnastasi Kosmadopoulos

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