visibility at night - vests and lights

https://www.respondersafety.com/news/news/2022/01/new-study-of-driver-perception-of-emergency-warning-lights-and-retroreflective-markings-commissioned-by-the-emergency-responder-safety-institute-yields-surprising-findings/ high intensity lights and safety vests are worst maybe - can we really believe this study? there probably needs to be huge lighted signs at every curve on an interstate highway that say ACCIDENT AHEAD SLOW DOWN