Kierrosaluetta

Kierrosaluetta is a Finnish term that translates to "roundabout area" or "circulation area." It refers to the central part of a traffic roundabout, the island that drivers are meant to circumnavigate. This area is typically raised and can vary in size and design depending on the roundabout's location and purpose.

The primary function of the kierrosaluetta is to guide traffic flow in a circular direction, separating opposing streams of vehicles and reducing the risk of head-on collisions. It also serves to prevent vehicles from cutting across the intersection, promoting orderly movement. In many cases, the kierrosaluetta is landscaped with grass, trees, or decorative elements to enhance the visual appeal of the intersection. In some instances, it may also be designed to accommodate pedestrian crossings or traffic signs.

The design and dimensions of the kierrosaluetta are crucial for the safe and efficient operation of a roundabout. A well-designed kierrosaluetta ensures that vehicles can navigate the roundabout smoothly without impeding traffic or creating hazards. In urban areas, these islands might be smaller, while in rural settings, they can be larger to accommodate heavier or faster-moving traffic. The presence and visibility of the kierrosaluetta are key elements for drivers to understand and correctly navigate a roundabout.