Vinterväglag

Vinterväglag is a Swedish term describing winter road conditions, meaning that the road surface is affected by snow, ice, frost, or slush in a way that reduces traction and alters driving behavior. The concept is used in traffic rules and everyday driving to indicate that drivers must adapt to wintery conditions.

In Sweden, vinterväglag råder when winter conditions prevail on road surfaces, and motorists are expected to use appropriate tires and drive with caution. The exact period when special requirements apply depends on weather and local regulations, but winter tires or all-season tires suitable for cold conditions are generally required during winter conditions. Studded tires may be permitted during the winter months, subject to national or local rules. If conditions are severe or localized, authorities may issue warnings or signs indicating vinterväglag on affected roads.

Tire requirements are central to vinterväglag. Winter tires are designed for low temperatures and provide better grip on snow and ice, while studded tires offer enhanced traction on icy surfaces. In some cases, chains or other traction aids may be used, particularly on steep or mountainous roads, or where signs indicate so. Vehicle maintenance, such as ensuring proper tire pressure and adequate tread depth, is emphasized during winter conditions.

Driving behavior under vinterväglag emphasizes reduced speeds, increased following distances, gentle acceleration and braking, and the use of headlights. Drivers should anticipate longer stopping distances and possible reduced visibility, and adjust routes and departure times accordingly. The concept is common across Nordic countries and is reflected in road signage and safety campaigns.