Placard Sign: such signs are often used on a transport vehicle to alert other drivers about what is being transported. This sign clearly informs readers and motorists about the combustible liquid or residue in transit Material: it is made of rigid plastic and can be mounted on smooth, curved or irregular surfaces. The material is ideal for long-lasting indoor and outdoor application Visibility: it has the legend “1993” in bold letters and contrasting colors to ensure clear visibility in most lighting conditions Specifications: the plastic sign is 10.75 in. wide, 10.75 in. high, and 0.050 in. thick. It shows black text on a white base DOT Placard: as specified by the U.S. Department of Transportation (DOT) 49 CFR 172.519, these placards are used for proper identification and classification of hazardous materials during transport and shipping