I've read all of the comments and I don't see ANYWHERE where anyone is accusing the pedestrians who were injured or killed for being at fault, or responsible.
What I do see is questions as to whether Ms. Day was fully at-fault, and as Hansen stated, violated multiple TriMet policies - or whether she was following procedures that were standard operating procedure and commonly followed, which contributed to the incident. And I am with Al M. - if TriMet policy, or any other factor, contributed to the collision, there should be every expectation that those policies and factors be reviewed so that a similar incident can be prevented in the future.
It is a fact that every bus (and in fact, most every vehicle) has blind spots. Heck, my car does, and admittedly there have been a few times where I was at a certain intersection and could not see a stopped vehicle on the cross street at a four-way stop because of the size of the other vehicle, the size of the A-pillar of my windshield, and the angle of the intersection (and I know that at that particular intersection I approach, and proceed through it, very differently as a result).
It's a known fact that the fareboxes on certain TriMet buses create a blind spot.
It's a known fact that TriMet uses a mirror on its New Flyer D40LF (2000, 2200-2900 series buses) that is attached at the bottom and can create a blind spot for some drivers; there are other transit agencies that attach the mirror at the top, above the driver's window, which could potentially eliminate or reduce the size of the blind spot.
Yes, Ms. Day certainly made mistakes, that is without question. But there are certainly other factors involved that contributed to it. It's as if someone wants to say that a given collision was caused by "speeding"...no, speeding does not in and of itself cause a collision. (Else every NASCAR race would end in exactly one half of a lap because the cars simply went too fast.) But speeding is certainly a contributing factor to many collisions.