Highway patrol manuever?

Question

What does it mean when there is a highway patrol car unit with lights on swerving into all lanes of traffic,both left and right ? All traffic seems to stay behind it, but what is the purpose behind this manuever ?

Answer 1

slow down traffic and ultimately to open up a large open area in the traffic pattern maybe because they are planning on closing the road or they are attempting to stop a car further up and need the road clear to apprehend the suspect.

Answer 2

The patrol does this to initiate a "traffic stop" or "traffic break" on a freeway. They usually do this if there's dangerous debris on the freeway ahead and a unit has been positioned to remove it, or to move cars that are on the center divider over to the right side of the freeway.

Answer 3

To hold back traffic (and eventually stop traffic), it should raise a red flag to other motorist that there is something go on ahead of them

Answer 4

rolling roadblock