Why should you be cautious around emergency vehicles using lights and sirens?

• Emergency vehicles have the right to disregard traffic laws.
• Emergency vehicles are required to drive at a constant speed.
• Emergency vehicles may exceed the posted speed limit when safe.
  Explanation:

  "Emergency vehicles, such as ambulances or fire trucks, can exceed the posted speed limit when responding to an emergency with lights and sirens. This flexibility in speed can make their actions unpredictable, so it's essential for other drivers to exercise caution and yield the right of way when encountering them on the road."
• Emergency vehicles do not use sirens during emergencies.