What should you be particularly cautious of when navigating a roundabout?

Answer: A — Other drivers not using turn signals

When navigating a roundabout, it is essential to be particularly cautious of other drivers not using turn signals. In a roundabout, drivers are expected to signal their intentions when exiting; however, not all drivers adhere to this practice. This failure to signal can create confusion and lead to potential accidents as you may not know which direction other vehicles are planning to go. Awareness of this can help you anticipate the actions of other drivers, allowing you to react appropriately and maintain safety while navigating the roundabout. While factors such as speed limits, fixed barriers, and road surface conditions are important to be aware of, the issue of signaling directly impacts immediate interactions with other vehicles and is a critical aspect of safe driving in this specific traffic pattern. Understanding and anticipating the actions of other drivers is vital for effective decision-making and improving overall traffic safety in roundabouts.