If it's really pedestrian fatalities we're concerned about, we should be implementing red right-facing arrows, which are on when the walk light is on.

Right on red, unless that arrow is on. Perhaps a blinking yellow arrow for when it isn't, just to avoid the ambiguity.

Or, when you're walking into the road, maybe make sure that drivers nearby see you. I played Ingress and Pokemon Go for years, in the city, at night, for years. Perhaps it's that I knew it put me at heightened risk so I paid more attention, but I really have a hard time understanding why people think that drivers are the only ones who need to pay attention when they're in the street.