Rondpunt

Rondpunt is a circular intersection where traffic flows around a central island. Vehicles entering the intersection yield to those already circulating, which helps organize competing movements and maintain smoother traffic flow.

Traffic direction depends on the driving side of a country. In most places with right-hand traffic, the circular movement runs counterclockwise; in left-hand traffic regions, it runs clockwise. The exact approach geometry, sightlines, and lane design are determined by national standards and local conditions.

Standard features include a central island, one or more circulating lanes, and approaches that may carry one or more lanes each. Signage and road markings indicate that entering drivers must yield to traffic on the circle. Pedestrians and cyclists often use marked crossings at each leg, with curb ramps or refuge islands as needed.

Variations range from mini-roundabouts with very small central islands to single-lane and multi-lane roundabouts, and turbo roundabouts designed to improve capacity by guiding vehicles along curved entry paths. Multi-lane roundabouts require clear lane guidance to prevent weaving and ensure safe merging.

Design and safety considerations emphasize reducing conflict points and controlling speed. Roundabouts can lower the likelihood and severity of crashes compared with traditional signalized or stop-sign intersections, but effectiveness depends on proper design, signage, maintenance, and user behavior. They require adequate deflection, sight distance, and appropriate pedestrian and cyclist accommodations.

Terminology varies by region. In Dutch, rondpunt is the common term; rotonde is sometimes used for larger or more complex roundabouts or in particular areas. Roundabouts are widely used in Europe, including the Netherlands and Belgium, and in many other countries seeking safer, more efficient urban traffic management.