Final answer:
When driving behind an emergency vehicle with flashing lights, it is important to maintain a safe distance of at least 500 feet.
Step-by-step explanation:
When driving behind an emergency vehicle that is flashing its lights, it is important to maintain a safe distance for both your safety and the safety of others on the road. The specific distance required can vary depending on local laws and conditions, but a general rule of thumb is to stay at least 500 feet behind the emergency vehicle. This gives the emergency vehicle enough space to maneuver and allows other vehicles to safely yield and follow behind.