I don't think the average driver employs rationality when scanning the road. I think their attention is governed simply by probability. 99% of activity on the

I don't think the average driver employs rationality when scanning the road. I think their attention is governed simply by probability. 99% of activity on the road are moving cars and trucks. So drivers look for moving cars and trucks, not fast mcyclists or slow bcyclists, and they largely ignore stationary objects like pedestrians (unless they're present in likely places like crosswalks). It's the norm for anyone to see what you most expect to see and overlook the less salient stuff as "noise". For outliers like cyclists and pedestrians, I think the only solution is deliberately to become harder to overlook. Personally, I suggest blinking lights on bcycles and pedestrians, and pulsing headlights (daytime) on mcycles.