Rundkørsel

Rundkørsel is a type of circular intersection used in Denmark and many other countries, where traffic travels around a central island. Vehicles entering the roundabout must yield to traffic already circulating. Drivers should signal when exiting to indicate their intended direction, and pedestrians and cyclists may cross at designated crossings near the approaches.

Roundabouts come in several forms. A single-lane roundabout has one lane in the circulatory carriageway, while multi-lane versions have two or more lanes that require lane discipline and appropriate signaling. Mini-roundabouts are small circular islands built to slow traffic at lower-speed streets. The design and layout influence traffic flow, visibility, and the required maneuvering for large vehicles.

The primary purpose of rundkørsel is to improve safety and efficiency at intersections. By reducing vehicle speeds and consolidating conflict points, roundabouts can lower the likelihood and severity of crashes compared with traditional stop-controlled or signalized intersections. They can also improve traffic throughput and reduce queue lengths, especially in urban areas with moderate to high turning movements.

Design considerations include approach geometry, lane arrangement, and clear signage to indicate priority and exits. Markings guide lane usage and turning movements, while crosswalks and bike paths are provided to protect pedestrians and cyclists. Maintenance of the central island, lighting, and sightlines is important to ensure safe operation, particularly at night or in adverse weather.

In Danish planning, rundkørsel is a common traffic-management tool that supports gradual speed reduction and smoother vehicle flow, contributing to safer and more efficient urban mobility.