[dragnet2]

That’s why they have collision investigators and re-constructionist. They’ll confirm what I’m telling you now. No way that much debris gets in traffic lanes without some of those people being in the traffic lanes to begin with.

[Blue Jays]

"...people being in the traffic lanes..."

---

So what if they were. Drivers have a responsibility to maintain control their vehicles. What if a car had a mechanical breakdown in same spot?
Uncertain as to why you are incredulous that debris would be scattered far and wide when humans are struck at 75 mph by a box truck.