An equipment operator is assigned to operate a grader near a known underground gas pipeline, clearly marked with 'Gas Pipeline' signs. The locate crew has spray-painted a solid yellow line on the ground. What does the solid yellow line typically indicate?

Question: An equipment operator is assigned to operate a grader near a known underground gas pipeline, clearly marked with 'Gas Pipeline' signs. The locate crew has spray-painted a solid yellow line on the ground. What does the solid yellow line typically indicate?

Answer options: ✅ The exact centreline of the buried gas pipeline.

• The edge of the proposed trenching area.
• The clearance boundary for all equipment.
• A temporary travel route for heavy equipment.

Correct answer: The exact centreline of the buried gas pipeline.

Explanation: According to Canadian Utility Locating Standards and the BC-1-1 Call Before You Dig program, a solid yellow line is the universal colour code indicating the exact centreline of a buried gas, oil, stream, petroleum, or gaseous materials pipeline. This marking is crucial for safe excavation planning.