Final answer:
When in doubt in a traffic circle, yield to drivers already in the circle, observe posted signs, and follow local traffic rules to ensure safety.
Step-by-step explanation:
When driving through a traffic circle, and in doubt about who has the right of way, the safest action to take is to yield to drivers already in the circle. Vehicles entering the traffic circle must wait for a gap in the circle's traffic before proceeding. This ensures that the flow within the circle remains smooth and minimizes the risk of collisions. It is important to observe the posted signage and traffic rules, as the specific right of way rules might vary by region.
Furthermore, while in a traffic circle, it's crucial for drivers to maintain a consistent speed, be aware of their surroundings, and signal appropriately when exiting the circle. In situations where there are no signs or the rules are unclear, the general guideline is to err on the side of caution and yield to circulating traffic.