What must you do when you encounter an emergency vehicle with lights flashing?

When you encounter an emergency vehicle with its lights flashing, pulling over and stopping if it is safe to do so is the appropriate action. This rule is designed to ensure the safety of emergency personnel as they respond to incidents. By moving your vehicle out of the way, you provide a clear path for the emergency vehicle, allowing it to reach its destination quickly and without unnecessary delays.

This response not only aids in emergency situations but also complies with traffic laws, which require drivers to yield to emergency vehicles. Failing to do so can lead to dangerous situations for both the emergency workers and other motorists. The other actions listed do not prioritize safety or compliance with traffic regulations as effectively and could result in obstruction or increased danger on the road.