What is the most important rule at a traffic circle?

Yielding to the traffic already in the traffic circle is essential because it helps maintain a smooth flow of vehicles and prevent accidents. When you enter a roundabout or traffic circle, vehicles already in the circle have the right of way. This means that drivers who are approaching the circle must slow down and be prepared to stop if necessary, allowing those already inside to move freely. This rule is crucial for ensuring that the intersection functions effectively and safely, minimizing confusion among drivers and reducing the likelihood of collisions.

The importance of yielding cannot be overstated, as it establishes a clear and predictable pattern for navigating the circle. Adhering to this rule also helps drivers and pedestrians anticipate movements, enhancing overall road safety. By ensuring that traffic can keep moving at a steady pace, roundabouts contribute to reduced traffic congestion and improve the efficiency of intersections.