Sleep

Sleep-deprived and behind the wheel: Exploring the impact of sleep patterns on new parents' driving behavior.

TL;DR

New parents experience pronounced sleep disruption and frequently engage in fatigued driving associated with higher crash-risk behaviors, highlighting the need for greater attention to fatigue-related driving risk during early parenthood.

Key Findings

New parents with infants under 12 months reported substantial sleep disruption, averaging six hours of sleep per night with generally poor sleep quality.

  • Sample size was 1,160 responses included in the analysis
  • Sleep quantity and quality were measured using a modified Pittsburgh Sleep Quality Index
  • Participants had at least one child under 12 months of age
  • The study used a cross-sectional design with an online survey conducted via Qualtrics
  • Sleep disruption was described as 'sustained' during the postpartum period

Over 90% of new parent participants reported driving while fatigued at least once in the past 30 days.

  • This prevalence was measured over a 30-day recall period
  • Fatigued driving was reported more frequently than speeding, mobile phone use, or alcohol- and drug-impaired driving
  • Common self-observed symptoms included poor concentration, tired eyes, increased blinking, and an increased likelihood of driving errors
  • The high prevalence suggests fatigued driving is near-universal among this population

Participants who reported fatigued driving also reported significantly higher levels of aberrant driving behaviors across all measured categories.

  • Aggressive Violations: t(1015) = -2.59, p = 0.01
  • Violations: t(1015) = -4.71, p < 0.001
  • Lapses: t(1015) = -6.23, p < 0.001
  • Errors: t(103) = -7.17, p < 0.001
  • Aberrant driving behaviors were measured using the Driver Behavior Questionnaire (DBQ)

Fatigue management among new parents relied primarily on short-term behavioral strategies such as caffeine intake and in-vehicle stimulation.

  • Uptake of fatigue-detection technologies was limited
  • Perceived effectiveness of fatigue-detection technologies was also limited
  • Behavioral strategies mentioned included caffeine intake and in-vehicle stimulation
  • No long-term or technology-based fatigue mitigation strategies were widely adopted

New parents showed limited comparative risk awareness regarding fatigued driving relative to other recognized road safety risks.

  • The survey measured comparative risk awareness as a distinct construct
  • Fatigued driving was reported more frequently than other impaired driving behaviors including alcohol- and drug-impaired driving
  • Despite high prevalence of fatigued driving, risk awareness was not commensurate with behavior
  • The authors suggest targeted road-safety messaging and healthcare-provider advice may help address this gap

The authors identified multiple intervention points for reducing fatigue-related driving risk among new parents.

  • Recommended interventions include targeted road-safety messaging and healthcare-provider advice
  • Supportive workplace policies were identified as a potential protective measure
  • Clearer communication about fatigue-detection technologies was recommended
  • The study highlights that early parenthood represents a specific high-risk period for fatigued driving that has been under-examined in road safety research

What This Means

This research suggests that new parents in Australia are at significant risk of driving while fatigued. Among more than 1,100 parents with babies under 12 months old, the vast majority — over 90% — reported driving while tired at least once in the previous month, averaging only six hours of sleep per night with poor overall sleep quality. Common warning signs they noticed in themselves included difficulty concentrating, tired eyes, more frequent blinking, and a feeling that they were more likely to make driving mistakes. The study found that parents who drove while fatigued also reported significantly higher rates of dangerous driving behaviors across every category measured — including errors, lapses in attention, traffic violations, and aggressive driving. Fatigued driving was reported more often than speeding, using a mobile phone while driving, or driving under the influence of alcohol or drugs, suggesting it may be one of the most common yet underappreciated road safety risks for this group. Despite this, most parents managed their fatigue with quick fixes like caffeine or turning up the music, and few used or trusted technology designed to detect driver fatigue. This research suggests that early parenthood is a specific window of heightened road safety risk that has not received enough attention. The authors point to several practical approaches that could help, including better advice from healthcare providers (such as midwives or pediatricians), road safety campaigns tailored to new parents, workplace policies that support adequate rest, and improved public understanding of fatigue-detection tools in vehicles. The findings underscore that fatigued driving by new parents is a widespread behavior with real crash-risk implications, not simply an inconvenience.

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Citation

Koppel S, McDonald H, Ueng Y, Ho M, Xiao J, Bennett J, et al.. (2026). Sleep-deprived and behind the wheel: Exploring the impact of sleep patterns on new parents' driving behavior.. Journal of safety research. https://doi.org/10.1016/j.jsr.2026.07.012