Final answer:
One should not stop within a roundabout unless necessary to avoid dangers. Safely continue and exit the roundabout rather than approaching or pacing emergency vehicles.
Step-by-step explanation:
Do not stop moving within the roundabout unless it is the only way to safely avoid a collision or any other danger. In the context of road safety and rules, this question is focused on how a driver should act when navigating a roundabout, especially when faced with emergency vehicles or unexpected hazards.
For example, if an ambulance is approaching within a roundabout, a car must not run toward the ambulance or run alongside the ambulance. The safest course of action is to continue moving and exit the roundabout at the earliest safe opportunity, then pull over to allow the ambulance to pass.