Working near traffic and around construction equipment can be dangerous, and staying safe is of the utmost importance. The purpose of this field guide is to raise awareness of the types and characteristics of high-visibility safety apparel for the protection of workers, with the ultimate goal of decreasing worker fatalities and injuries. This field guide provides contractors, field personnel, inspectors, and engineers with guidance on selecting high-visibility safety apparel. This guide outlines different apparel and the appropriate situations where each type of apparel is required or recommended by national standards/guidelines. When selecting the appropriate apparel, you should also check state and local requirements.