Suggestion - Closing down roads/slowing traffic at traffic stops

So we have the option to close down/slow traffic on roads during a traffic stop.  I thought it would be cool if that task actually required an NPC officer to handle.  So say you want to close down or slow the traffic in the lane you are in, you need to simply call for your lane to be closed or slowed and an officer will drive x distance from the scene, clear the cars already piled up and physically block off the lane.  If you wanted to close down both sides of the street, you would need to request a full road block within x distance of your position and at least 2 officers would cover both sides of the road, clearing it and physically blocking it off.

I think this would really add to the immersion aspect of traffic stops, shootouts and such where you really don't want civilians getting caught in the cross fire and at the same time don't want it to look like everyone magically decided to obey your closed off traffic rule.