It is kinda interesting that the trucker didn't notice the slow moving wheeled pedestrian dressed in bright red. :thinking:
Think about the angle of visibility from the cab of a semi-truck. Those things have huge blind spots, including directly in front of the grill. You could probably miss seeing an entire car from up there if it was close enough. That's why school buses have those wire "crossing guards" to force the kids to cross where the driver can see them. I think before those were implemented, several kids got run over and killed because they stopped in the driver's blind spot while crossing. A guy in a wheelchair is about the same height as a kid, and buses have much better forward visibility than semis.
The trucker may be technically responsible, but realistically, I don't know how he could have seen the guy. Theoretically, there could be mirrors placed to eliminate the forward blind spot, but I don't know if there actually are. Any truckers among us know the answer to that?
Also, the fact that the wheelchair didn't make it all the way across before the light changed indicates a problem: Maybe the light cycle was too short for the wheelchair's speed, or maybe the guy started crossing after the walk signal switched to the flashing hand.
What else did he need to be seen? :shrug:
Maybe a dayglo orange pennant on a ten foot wire pole. Don't recumbant cyclists use those?