What does the marking color yellow signify?

The marking color yellow is designated for indicating the presence of hazardous materials such as natural gas, oil, steam, and other HAZMAT substances. This color coding is part of a standardized system used to ensure safety and awareness during construction, excavation, and maintenance activities. The use of yellow makes it easier for workers and the public to identify areas where caution is required due to the potential presence of flammable or toxic substances. This is critical for preventing accidents and ensuring that proper safety protocols are followed when working in proximity to these types of pipelines or utilities.