Which of the following can result from a runway incursion?

A runway incursion occurs when an unauthorized vehicle, person, or aircraft is on a runway, which can significantly compromise safety. The correct answer is that a collision hazard can result from a runway incursion because the presence of an obstruction can lead to dangerous situations where an aircraft could collide with the unauthorized entity on the runway. This not only poses immediate risks to the safety of the aircraft but also to the people onboard and anyone on the ground. It is crucial for air traffic control and pilots to manage and mitigate these incursions to ensure safe operations at the airport.

While other outcomes such as delayed flights can happen due to corrective measures taken after an incursion, the primary and most critical consequence is the potential for a collision that could endanger lives and disrupt airport operations.