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Sleep-related vehicle crashes on low speed roads.
Accid Anal Prev. 2017 Feb; 99(Pt A):279-286.AA

Abstract

BACKGROUND

Very little is known about the characteristics of sleep related (SR) crashes occurring on low speed roads compared with current understanding of the role of sleep in crashes occurring on high speed roads e.g. motorways. To address this gap, analyses were undertaken to identify the differences and similarities between (1) SR crashes occurring on roads with low (≤60km/h) and high (≥100km/h) speed limits, and (2) SR crashes and not-SR crashes occurring on roads with low speed limits.

METHOD

Police reports of all crashes occurring on low and high speed roads over a ten year period between 2000 and 2009 were examined for Queensland, Australia. Attending police officers identified all crash attributes, including 'fatigue/fell asleep', which indicates that the police believe the crash to have a causal factor relating to falling asleep, sleepiness due to sleep loss, time of day, or fatigue. Driver or rider involvement in crashes was classified as SR or not-SR. All crash-associated variables were compared using Chi-square tests (Cramer's V=effect size). A series of logistic regression was performed, with driver and crash characteristics as predictors of crash category. A conservative alpha level of 0.001 determined statistical significance.

RESULTS

There were 440,855 drivers or riders involved in a crash during this time; 6923 (1.6%) were attributed as SR. SR crashes on low speed roads have similar characteristics to those on high speed roads with young (16-24y) males consistently over represented. SR crashes on low speed roads are noticeably different to not-SR crashes in the same speed zone in that male and young novice drivers are over represented and outcomes are more severe. Of all the SR crashes identified, 41% occurred on low speed roads.

CONCLUSION

SR crashes are not confined to high speed roads. Low speed SR crashes warrant specific investigation because they occur in densely populated areas, exposing a greater number of people to risk and have more severe outcomes than not-SR crashes on the same low speed roads.

Authors+Show Affiliations

Queensland University of Technology (QUT), Centre for Accident Research and Road Safety - Queensland (CARRS-Q), 130 Victoria Park Road, Kelvin Grove, QLD, Australia. Electronic address: A.J.Filtness@lboro.ac.uk.Queensland University of Technology (QUT), Centre for Accident Research and Road Safety - Queensland (CARRS-Q), 130 Victoria Park Road, Kelvin Grove, QLD, Australia.Queensland University of Technology (QUT), Centre for Accident Research and Road Safety - Queensland (CARRS-Q), 130 Victoria Park Road, Kelvin Grove, QLD, Australia.Queensland University of Technology (QUT), Centre for Accident Research and Road Safety - Queensland (CARRS-Q), 130 Victoria Park Road, Kelvin Grove, QLD, Australia.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

27992761

Citation

Filtness, A J., et al. "Sleep-related Vehicle Crashes On Low Speed Roads." Accident; Analysis and Prevention, vol. 99, no. Pt A, 2017, pp. 279-286.
Filtness AJ, Armstrong KA, Watson A, et al. Sleep-related vehicle crashes on low speed roads. Accid Anal Prev. 2017;99(Pt A):279-286.
Filtness, A. J., Armstrong, K. A., Watson, A., & Smith, S. S. (2017). Sleep-related vehicle crashes on low speed roads. Accident; Analysis and Prevention, 99(Pt A), 279-286. https://doi.org/10.1016/j.aap.2016.12.002
Filtness AJ, et al. Sleep-related Vehicle Crashes On Low Speed Roads. Accid Anal Prev. 2017;99(Pt A):279-286. PubMed PMID: 27992761.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Sleep-related vehicle crashes on low speed roads. AU - Filtness,A J, AU - Armstrong,K A, AU - Watson,A, AU - Smith,S S, Y1 - 2016/12/16/ PY - 2016/04/11/received PY - 2016/07/11/revised PY - 2016/12/03/accepted PY - 2016/12/20/pubmed PY - 2017/2/28/medline PY - 2016/12/20/entrez KW - Driver drowsiness KW - Driver fatigue KW - Driver sleepiness KW - Police data KW - Road crash SP - 279 EP - 286 JF - Accident; analysis and prevention JO - Accid Anal Prev VL - 99 IS - Pt A N2 - BACKGROUND: Very little is known about the characteristics of sleep related (SR) crashes occurring on low speed roads compared with current understanding of the role of sleep in crashes occurring on high speed roads e.g. motorways. To address this gap, analyses were undertaken to identify the differences and similarities between (1) SR crashes occurring on roads with low (≤60km/h) and high (≥100km/h) speed limits, and (2) SR crashes and not-SR crashes occurring on roads with low speed limits. METHOD: Police reports of all crashes occurring on low and high speed roads over a ten year period between 2000 and 2009 were examined for Queensland, Australia. Attending police officers identified all crash attributes, including 'fatigue/fell asleep', which indicates that the police believe the crash to have a causal factor relating to falling asleep, sleepiness due to sleep loss, time of day, or fatigue. Driver or rider involvement in crashes was classified as SR or not-SR. All crash-associated variables were compared using Chi-square tests (Cramer's V=effect size). A series of logistic regression was performed, with driver and crash characteristics as predictors of crash category. A conservative alpha level of 0.001 determined statistical significance. RESULTS: There were 440,855 drivers or riders involved in a crash during this time; 6923 (1.6%) were attributed as SR. SR crashes on low speed roads have similar characteristics to those on high speed roads with young (16-24y) males consistently over represented. SR crashes on low speed roads are noticeably different to not-SR crashes in the same speed zone in that male and young novice drivers are over represented and outcomes are more severe. Of all the SR crashes identified, 41% occurred on low speed roads. CONCLUSION: SR crashes are not confined to high speed roads. Low speed SR crashes warrant specific investigation because they occur in densely populated areas, exposing a greater number of people to risk and have more severe outcomes than not-SR crashes on the same low speed roads. SN - 1879-2057 UR - https://www.unboundmedicine.com/medline/citation/27992761/Sleep_related_vehicle_crashes_on_low_speed_roads_ DB - PRIME DP - Unbound Medicine ER -