What should you do if you encounter a roundabout?

When you approach a roundabout, it is important to yield to traffic that is already circulating within the roundabout. This practice helps maintain a smooth flow of traffic and reduces the risk of collisions. Roundabouts are designed to allow vehicles to merge into the circular flow, and yielding to those already in the roundabout ensures you can enter safely without disrupting their movement.

Yielding is essential because drivers inside the roundabout have the right of way, and attempting to enter without yielding could lead to dangerous situations. By adhering to this rule, drivers not only ensure their own safety but also the safety of others.

In contrast, speeding through without stopping disregards the necessary caution needed when entering a roundabout, while stopping and waiting for a sign could create unnecessary delays and confusion. Making a U-turn is also not appropriate as it is not a function of roundabouts and could block traffic. Therefore, yielding to existing traffic is the correct and safest action to take when encountering a roundabout.