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Traffic accidents impart both economic and social costs upon communities around the world, hence the desire for accident rates to be reduced. For this reduction to occur, the factors influencing the occurrence of accidents must be understood. The role of congestion in modifying accident risk has been widely studied, but consensus has not been reached, with conflicting results leaving open questions. An inverse relationship between accidents and congestion would imply a benefit of congested conditions for road safety, posing a difficult situation for traffic management. This paper assesses articles that reveal the shape of the relationship between traffic accidents and congestion. We find a positive linear response to dominate the literature. However, studies with higher numbers of statistical units tend to show a U-shaped relationship. This suggests an important role of high spatio-temporal traffic data in understanding factors causing accidents and identifying the combination of real-time conditions which may lead to increased accident risk. Modern advancements in traffic measurement systems provide the ability for real-time alleviation of accident-prone conditions before they can fully develop.
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6766193 | PMC |
http://dx.doi.org/10.3390/ijerph16183400 | DOI Listing |
J Neural Transm (Vienna)
September 2025
Parkinson's Foundation Centre of Excellence, King's College Hospital, Denmark Hill, London, SE5 9RS, UK.
Parkinson's disease patients are at increased risk of road traffic and car accidents and those with excessive daytime sleepiness are specially susceptible. Abnormal scores on the Epworth Sleepiness Scale predicts risk for driving-related somnolence which may cause road traffic accidents in driving patients as many such patients declare dozing of while in a car. Our study estimates that over 40% of patients with daytime somnolence have risks of dozing off in a car.
View Article and Find Full Text PDFJ Safety Res
September 2025
School of Humanities and Social Sciences, Fuzhou University, Fuzhou 350116, China. Electronic address:
Introduction: Listening to music while driving is a common practice. Extensive research has explored its effects on driving performance, with a growing consensus suggesting that the optimal complexity of music varies depending on different driving scenarios to maintain drivers' arousal levels. However, these optimal levels can vary significantly among individuals.
View Article and Find Full Text PDFJ Safety Res
September 2025
Department of Civil Engineering, Kırıkkale University, 71450 Yahşihan, Kırıkkale, Turkiye. Electronic address:
Introduction: Roundabouts are increasingly being used to improve traffic flow and reduce conflict points compared to traditional intersections. While previous studies have generally shown that roundabouts reduce vehicle collisions and improve traffic conditions, their impact on pedestrian safety, particularly in urban areas with high pedestrian traffic, has not been adequately studied. Despite the potential of roundabouts to reduce the overall severity of collisions, recent studies also point to specific safety challenges for pedestrians, including the difficulties faced by slow-moving people, changes in pedestrian behavior when avoiding roundabouts, and problems with disabled pedestrians are faced with.
View Article and Find Full Text PDFJ Safety Res
September 2025
School of Health and Biomedical Sciences, RMIT University, Australia; Institute for Breathing and Sleep, Austin Health, Heidelberg, Australia.
Introduction: Drowsiness is a significant cause of crashes in the various transport industries, including automotive, aviation, and rail. Our previous study investigated the differential induction of drowsiness in drivers caused by specific whole-body vibration (WBV) frequency ranges, with an amplitude of 0.2 m/s r.
View Article and Find Full Text PDFJ Safety Res
September 2025
Center for Injury Research and Policy, Abigail Wexner Research Institute at Nationwide Children's Hospital, Department of Pediatrics, College of Medicine, The Ohio State University, Division of Epidemiology, College of Public Health, USA.
Background: Graduated Driver's Licensing (GDL) policies create an intermediate licensure phase for young novice drivers, and previous studies suggested that they reduce teen motor- vehicle crashes (MVCs). Multiple studies have shown that the effects of GDL laws vary in association with demographic factors and location, motivating estimation of sub-state policy effects. The present study estimates county-level effects of Ohio's 2007 enhanced GDL law on MVCs among 16-17-year-olds.
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