Ringkierros

Ringkierros is a Finnish term that can be translated to "roundabout" or "traffic circle." It refers to a type of circular intersection where traffic flows in one direction around a central island. Vehicles entering a ringkierros must yield to traffic already in the circle. The primary purpose of a ringkierros is to improve traffic flow and safety at intersections by reducing the number of conflict points compared to traditional intersections with traffic lights or stop signs.

Ringkierros designs can vary in size and complexity. Smaller, simpler ones are common in residential areas or as alternatives to four-way stops. Larger, more complex versions may incorporate multiple lanes and more sophisticated entry and exit points, particularly in urban environments or on major roadways. The design aims to slow down traffic, making it easier for drivers to find gaps and enter the circle safely. Pedestrians and cyclists are also accommodated in ringkierros, often with designated crossing areas or paths.

The implementation of ringkierros has been shown to reduce certain types of accidents, particularly those involving severe T-bone collisions and head-on impacts, as traffic speeds are generally lower and movements are more predictable. However, they can sometimes present challenges for pedestrians and cyclists, and drivers unfamiliar with their operation may initially find them confusing.