Oh lord, that's awful. What a terrible thing to experience and witness.
Driving is by far the most dangerous thing any of us do, except maybe skydiving and mountaineering. It's so routine, numbing our attention, and yet we live every moment within a hair's breadth of disaster.
Bruce, if in time you find that the images keep coming back to you or you're feeling guilt and remorse even though you couldn't do anything, please talk about it to
people you trust, or a counsellor.