I got this safety vest (neon green with orange reflective stripes) from Harbor Freight and just tonight I tested it on a real busy road on rush hour coming home, some part of the roads were dark and hilly:
cars and trucks literally open themselves up away from me, gave me room enough to feel secure that I'm seen, I checked all cars coming from behind using my little glasses' mirror, I could tell they SAW me!
Of course, The vest in combination with two strobes on the back of my helmet, handlebar blinking lights, and a seat rear light, plus the usual front light.

Corsaire