Safe traffic : Vision Zero on the move

NHTSA · 2006 · ROSA P / Sweden. Vagverket

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Summary

This document outlines the principles, implementation, and outcomes of Sweden’s "Vision Zero" road safety strategy, which was ratified by Parliament in 1997 and introduced in 1995. Vision Zero is defined as both an ethical stance and a systemic strategy asserting that no one should be killed or seriously injured in traffic. It fundamentally shifts the responsibility for safety from individual road users to the designers of the road transport system, including road managers, vehicle manufacturers, politicians, and legislative bodies. The core philosophy posits that while human error is inevitable, the system must be designed to accommodate human biological limitations and tolerance, ensuring that mistakes do not result in fatal or life-altering injuries. The strategy relies on several key pillars: ethical standards, adaptation to human capability, and a holistic system perspective where roads, vehicles, and users interact. Scientific data informs design limits, such as the finding that most pedestrians survive impacts at 30 km/h but are likely killed at 50 km/h. Consequently, the Swedish Road Administration (SRA) has implemented infrastructure changes, including widespread 30 km/h speed limits in built-up areas, the installation of central median barriers on highways, and the increased use of roundabouts to reduce collision severity. Vehicle safety has improved through initiatives like Euro NCAP, which provides consumer safety ratings, and the development of seat belt reminders and alcohol ignition interlocks. The SRA also conducts in-depth studies of fatal collisions, leading to "OLA" projects that coordinate specific safety improvements among system designers. Since its introduction, Sweden has seen a reduction in road deaths despite an increase in traffic volume. The approach has shifted focus from merely preventing accidents to preventing serious injuries, exemplified by the preference for roundabouts over traffic lights at intersections. While firm long-term conclusions on injury reduction are still developing due to the slow pace of infrastructure and fleet replacement, the strategy has successfully altered road environments and fostered closer cooperation among stakeholders. The document highlights that Vision Zero challenges traditional legislation, which places responsibility on individuals, and calls for legal reviews to align with shared responsibility. It also notes the global context, where road deaths remain a major public health issue, positioning Sweden’s low per capita death rate as a model for international adoption.

Key finding

Sweden has observed a reduction in road deaths since the introduction of Vision Zero, although it is too early to draw firm conclusions about the impact on serious injuries due to the slow pace of infrastructure and vehicle fleet changes.

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