What must a driver do when approaching a roundabout in Iowa?

When approaching a roundabout in Iowa, the driver must yield to traffic that is already in the roundabout. This rule is in place to ensure a smooth flow of traffic and to prevent collisions within the circular intersection. Vehicles inside the roundabout have the right of way, so drivers must wait for a safe gap before entering.

Yielding also allows for the efficient movement of traffic, minimizing delays that would occur if vehicles were allowed to enter the roundabout without regard for those already circulating. Understanding this rule is crucial for driving safely in areas with roundabouts and contributes to overall traffic safety and efficiency.