A diamond-shaped road sign is a type of warning sign used to alert drivers to potential hazards or changes in road conditions ahead. In Arizona and other states, diamond-shaped signs are typically yellow or orange with black symbols or lettering. Discover the meanings of 20 common warning safety signs to help you recognize hazards and ensure safety in various environments. Learn the 50 most common traffic warning signs in the US. What they mean, what they look like (shape and color), and where they are located. Arizona Manual of Approved Signs (MOAS) - the official list of road, highway, and traffic signs for use on state highways in the State of Arizona. Warning signs highlight existing conditions, such as curve, school, dead-end street, or traffic signal. They can also warn of possible dangers such as bumps, bicycles, low-flying aircraft, or emergency vehicles. The Arizona Manual of Approved Signs (MOAS) is the official list of road, highway, and traffic signs for use on state highways in the State of Arizona, and establishes standard codes and designations for Arizona-specific signs. Learn about our notification systems, understand warning signals, and sign up to receive critical alerts that could affect your neighborhood. Explore 25 crucial safety signs and symbols, and understand their meanings. This guide illuminates the visual language that safeguards our daily lives. Learn the meanings of common safety signs and symbols, including workplace sign colors, warning signs, mandatory PPE signs, fire signs, emergency signs, and key standards to check. A warning sign is a type of sign which indicates a potential hazard, obstacle, or condition requiring special attention. Some are traffic signs that indicate hazards on roads that may not be readily apparent to a driver.