In traffic control terminology, what does an "Option condition" signify?

Answer: B — statement of a permissive condition

An "Option condition" in traffic control terminology signifies a statement of a permissive condition. This means it indicates situations or behaviors that are allowed or permitted under certain circumstances. In traffic management, this could refer to scenarios where certain actions may be taken by road users, ensuring flexibility within the established guidelines. Option conditions often accompany regulations or mandates but serve to clarify when certain actions can be considered acceptable, thus aiding in the smooth flow of traffic while still adhering to safety standards. Understanding this distinction is crucial for traffic control technicians, as it allows them to implement traffic control measures that are both effective and adaptable to varying situations.