When is a wrecker considered to be an emergency vehicle

I believe the answer is: its emergency lights are flashing

When is emergency lights are flashing, the wrecker would most likely driving toward the area where accidents happen, and they would be used to drag out ruins or the heavy vehicles that collided on the sites. Because of this, we need to provide space for the wrecker to pass if it shows its emergency lights.

Hi!

If an accident happens on a highway, with a truck involved, for example, which may causes another accident, the wrecker will clear the road and avoid more problems.

Sorry for my poor English ...

bye