Originally Posted by JoeyBike

The merge lane ending near the point of impact sheds some light for me. Many ppl are terrible at merging. I could picture a person looking in driver's side door mirror trying to merge, running out of room put two wheels over the fog line while fixated on traffic to the left and not looking through the windscreen at all.

I wasn't there. Just rationalizing some reasonable explanation beyond phone use or murder. The more we know the more we can try to avoid in our own lives both driving AND cycling. Knowledge is power.