A roundabout, also known as a traffic circle or rotary, is a type of intersection in which traffic moves around a central island. Roundabouts are designed to improve traffic flow and safety by reducing the number of conflict points between vehicles.

Here's how roundabouts work:

1. Yield to traffic already in the roundabout. This is the most important rule of roundabout driving. When you approach a roundabout, you must yield to any vehicles that are already in the circle.

2. Enter the roundabout in a clockwise direction. This is the standard direction of travel in roundabouts.

3. Stay in your lane. Do not change lanes while you are in the roundabout.

4. Exit the roundabout when you reach your desired exit. When you are ready to exit the roundabout, signal and move to the right lane. Then, yield to any vehicles that are already in the lane you want to enter.

5. Roundabouts can be confusing at first, but they are actually quite simple and safe to navigate. By following these tips, you can help to keep traffic flowing smoothly and safely.

Here are some additional tips for driving in roundabouts:

* Be aware of your surroundings. Pay attention to other vehicles, pedestrians, and cyclists in the roundabout.

* Use your turn signals. Signal when you are entering, exiting, or changing lanes in the roundabout.

* Drive slowly. The speed limit in a roundabout is typically 20-25 mph.

* Be patient. Roundabouts can be congested at times. Be patient and wait for your turn to enter or exit the circle.

Roundabouts are a safe and efficient way to manage traffic flow. By following these tips, you can help to make roundabouts work for you.