What is the primary function of roundabout intersections?

The primary function of roundabout intersections is to improve traffic flow. Roundabouts are designed to facilitate the continuous movement of vehicles, allowing them to yield rather than stop completely at traffic signals or stop signs. This design reduces delays and enhances the efficiency of traffic management by minimizing the number of stop-and-go situations.

As vehicles enter a roundabout, they merge with traffic already circulating within it, which helps maintain a steady stream of traffic. This flow reduces congestion and can lead to fewer accidents, particularly severe ones, as collisions are typically less impactful due to the lower speeds involved.

Other options focus on different aspects of traffic management. While minimizing the number of traffic lights can be a secondary benefit of roundabouts, it is not their primary purpose. Additionally, roundabouts may not necessarily lead to faster speeds, as they encourage a slower, more controlled approach to navigating intersections. Finally, roundabouts do not inherently increase the number of lanes; they can have one or multiple lanes depending on their design, but their main goal is to manage traffic flow effectively.