What does the yellow color signify in utility markings?

• A. Water lines
• B. Gas, oil, steam, and other flammable materials
• C. Electrical lines
• D. Communication cables

Answer: (B)

The yellow color in utility markings is universally recognized as a designation for gas, oil, steam, and other flammable materials. This system of color coding is crucial in ensuring safety during excavation and construction activities, as it helps workers identify the potential hazards associated with underground utilities. Recognizing yellow markings alerts personnel to the presence of flammable substances, prompting them to take necessary precautions to prevent accidents such as explosions or fires.

When engaging with underground utilities, understanding these color codes is essential for maintaining safety standards and avoiding damage to infrastructure. Each color has its specific purpose, and the identification of yellow for gas and other flammable materials helps to create a safer work environment by clearly communicating the nature of the utility present.