What signifies the resumption of normal air traffic?

The correct answer is the point at which the 30-minute traffic suspension has expired. This signifies the resumption of normal air traffic because it establishes a clear timeframe during which air traffic operations were suspended for safety reasons, commonly due to an event like an emergency, military activity, or severe weather. Once this stipulated time has elapsed, air traffic control can begin to restore regular operations, assuming that safety concerns have been adequately addressed.

Resuming normal air traffic after this designated suspension period allows controllers to assess the situation thoroughly, ensuring that the airspace can be managed safely and efficiently as operations restart. The expiration of this suspension provides both a structured approach to gradually reintegrating flights and a measurable metric for controllers to determine when to begin regular traffic flows again.

Although accounting for all flights, completing traffic pattern reviews, and weather improvements are important aspects of air traffic management, they are secondary to the key procedural benchmarks designed to ensure safety and control before normal operations can resume.