Protecting Vulnerable Road Users from Injury

Constant, Aymery; Lagarde, Emmanuel · 2010 · Crossref

DOI: 10.1371/journal.pmed.1000228

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Summary

This policy forum addresses the escalating global health crisis of injuries to vulnerable road users (VRUs), defined as pedestrians, pedal cyclists, and motorcyclists who lack external protective shields. The authors highlight that VRUs account for half of the 1.2 million annual road traffic fatalities worldwide, with disproportionate representation among children and the elderly. While industrialized nations have seen reduced fatalities for car users, VRU injuries are rising in urban areas due to environmental and traffic congestion concerns. In developing countries, VRU injuries pose a severe threat to development, with motorized two-wheelers and pedestrians comprising the majority of deaths in nations like Thailand, Sri Lanka, and India. The paper aims to review the burden of these injuries, identify barriers to effective policy, and outline evidence-based prevention strategies for both industrialized and developing contexts. The authors analyze existing literature and systematic reviews to evaluate data collection weaknesses and potential countermeasures. They note that police records significantly underestimate VRU crashes, particularly non-fatal incidents involving bicycles, which are often misclassified as leisure activities rather than transport. The review examines three general traffic policies—speed, alcohol, and visibility/conspicuity—as well as specific interventions for motorcyclists, cyclists, and pedestrians. Key findings indicate that speed mitigation is critical; survival rates for pedestrians and cyclists struck by cars drop from over 90% at 30 km/h to less than 50% at 45 km/h. Traffic-calming engineering measures, such as speed bumps and roundabouts, are identified as effective interventions. Regarding alcohol, blood alcohol limit enforcement and ignition interlocks are recommended, though enforcement faces challenges like corruption in some regions. Specific countermeasures vary by user group. For motorcyclists, helmet use reduces fatal injury risk by 42%, though usage rates remain low in many developing countries due to inadequate regulation and awareness. For cyclists, infrastructure modifications like segregated bike lanes offer the lowest risk, while helmet use reduces head injury risk by 70%, despite controversy over mandatory laws. For pedestrians, side-walks and refuge islands are effective, but visibility remains a major issue, with 67% of fatal vehicle-pedestrian collisions in the U.S. occurring at night. The authors emphasize that conspicuity aids and improved street lighting are essential, particularly in rural areas and developing nations where lighting is poor. Additionally, vehicle design improvements, such as safer car fronts and advanced sensing systems, are noted as promising but currently limited by cost. The significance of this work lies in its call for a multipronged approach to road safety that combines passive and active devices, regulations, enforcement, and awareness campaigns. The authors conclude that while developing countries can learn from industrialized nations, they face unique challenges related to cost, feasibility, and high traffic mix. Crucially, the paper argues that VRUs must not be exempted from traffic rules; instead, prevention efforts must address VRU risk behaviors, such as alcohol use and lack of hazard awareness, alongside motorist behaviors. Shifting cultural attitudes and improving data collection through cooperation between police, emergency departments, and public health agencies are presented as pivotal steps toward reducing the global burden of VRU injuries.

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Topics

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• vru crash typology