What is the purpose of a roundabout in traffic management?

The primary purpose of a roundabout in traffic management is to expedite traffic flow. Roundabouts are designed to keep vehicles moving continuously, reducing delays and congestion that often occur at traditional intersections. By allowing vehicles to merge and exit in a circular fashion, roundabouts minimize the need for stopping at traffic signals and stop signs, thereby encouraging a smooth flow of traffic.

They are particularly effective in handling high volumes of traffic by allowing drivers to yield to vehicles already in the roundabout instead of coming to a complete stop. This results in fewer conflicts between vehicles and can lead to reduced accident rates. Additionally, roundabouts can help reduce the overall time spent by drivers waiting to make turns or cross intersections, further enhancing the efficiency of the road system.

In contrast, the other options relate to functions typically not associated with roundabouts. Parking opportunities, restrictions on vehicle movement, and the enforcement of speed limits are not primary objectives of a roundabout; rather, they are aspects connected to road design and traffic regulation in different contexts.