OK, maybe im the only one that doesnt know what these things are for, but what are the black straps hanging from the rear bumper of pickups for? I see them all the time hanging from different locations, and sometimes there is one, other times I see 2, and a couple times I have seen 3 or 4. These straps are usually hanging from company trucks, but I have seen them hanging from unmarked pickups with no logos or DOT numbers.
I would take a picture, but usually the only time I see them is when Im driving so I cant really get a pic.
Can someone tell me what those are for?