Fluorescent signs have gained widespread adoption, as their durability has improved and production costs have decreased. Today, agencies frequently use fluorescent yellow, fluorescent yellow-green, and fluorescent orange for warning signs. Orange has been the standard color for roadway construction signs in the United States since 1971. By the mid-1980s, fluorescent orange appeared on roll-up signs, and by the mid-1990s, it became standard for rigid signs. Over time, advancements in materials have greatly enhanced the durability and brightness of fluorescent signs, making them a staple in most work zones. Their application has even expanded to include temporary traffic control devices.

Ultimately, providing effective, clear warnings for road work is not just a matter of compliance—it's a matter of safety. Using colors that differ from standard regulatory signs ensures drivers are more likely to notice and respond to the warnings. Incorporating fluorescent colors further increases the likelihood of capturing attention and preventing accidents. After all, these measures could protect someone's spouse, child, parent, or friend. While seemingly minor, the choice of sign color can make a life-saving difference.