Final answer:
Drivers should pull over to the right side of the road and come to a complete stop when they hear or see an approaching emergency vehicle using its lights and siren.
Step-by-step explanation:
When drivers hear or see an approaching emergency vehicle using its lights and siren, they should respond by pulling over to the right side of the road and coming to a complete stop. This allows the emergency vehicle to pass safely and quickly. If the drivers are at an intersection, they should not block the intersection and should wait until the emergency vehicle has passed before proceeding.