NHSA Module 5 Practice Test

School zone warning signs use fluorescent yellow-green because this bright, high-visibility color grabs drivers' attention quickly and signals a special warning area where children may be present. This color is chosen to be easily distinguished from other sign colors, especially in varied lighting conditions, so drivers slow down near schools, bus routes, and crosswalks. Other colors have different meanings: blue signs indicate services, brown signs point to recreational or cultural sites, and red signs convey stops or prohibitions, so they aren’t used for school-zone warnings. Using fluorescent yellow-green helps reduce the chance of missing these warnings and promotes safer driving in school areas.