Emergency vehicles:

You must yield the right-of-way to police cars, fire engines, ambulances, or any other emergency vehicles using a siren or air horn and a red or blue flashing light. Follow any instructions given over the emergency vehicles' loudspeakers. Emergency vehicles often follow each other so you should proceed only when you are certain the way is clear.

• Have the right-of-way when using sirens, horns, and/or flashing lights.
• May use a loudspeaker to give instructions.
• May follow each other.
• All of the above.