How do we know that he didn't turn directly in front of the Tesla and yet the Tesla driver DID stand on the brakes - the antiskid would have prevented any skid marks - but the distance and time available to him was simply insufficient to reduce the speed enough to avoid a fatal collision? From what I've read it's just speculation that the Tesla driver was completely passive in this event - do we actually know that for sure? Do we have some data from the Tesla's onboard electronics that tell the real story?
If so, I'd like a link (and not to media speculation).
What we know by the sketch the police released is that the truck made a left turn, and the first half of the truck had already cleared the car's lane. It takes several seconds for a truck to get that far from a standstill, and while the white trailer might have been invisible due to inconvient lighting, I very much doubt the same applies to the tractor part (if lighting was indeed *that* bad, he should have slowed way down to begin with. You need to be able to see where you're going!) How long would it take the driver to get that far? Based on the 5 seconds mentioned earlier, maybe 4 seconds?
4 seconds is enough (including some reaction time) to come from highway speeds to a full stop. And it takes less time to at least slow down enough for the crash to no longer be fatal. And he wouldn't have needed to come to a stop either, just slow down enough so that he would arrive at the intersection a second or two later and thus avoid the truck.
If the driver did actually brake, he did so so late that the car still had enough energy to pass under the truck despite the severe impact and continue on for quite a bit. Can't have been for more than a second I reckon.
The truck driver might have technically cut off the car, but I still think the tesla driver had many seconds to react yet didn't for whatever reason. A semitrailer truck is not a fast vehicle, and a left turn across an intersection isn't a sudden maneuver. So the tesla driver being surprised through no fault of his own? No, I don't buy it.