In a pipeline work zone, which practice helps prevent unauthorized entry?

In a pipeline work zone, which practice helps prevent unauthorized entry?

• A. Use signs and barricades to prevent unauthorized entry and post operator and emergency contacts.
• B. Signage is optional in a work zone.
• C. Barricades are not required when the area is small.
• D. Only the operator is responsible for safety, not signage.

Answer: (A)