What is the consequence of a runway incursion?

A runway incursion is defined as any occurrence where an unauthorized person, vehicle, or aircraft is on the runway, which can pose significant safety risks. The primary consequence of such an incursion is the potential for a collision or accident on the runway. This can lead to severe injuries, loss of life, and damage to aircraft and airport infrastructure, underscoring the critical nature of maintaining strict protocols to prevent unauthorized access to runway areas.

While improved safety protocols (as mentioned in another option) may be a response to runway incursions, they are not an immediate consequence. Similarly, increased efficiency during takeoff or a reduction in air traffic delays are outcomes that can be hindered by runway incursions, as they disrupt the orderly flow of airport operations and can necessitate delays for safety checks or investigations. Thus, the essence of a runway incursion lies in the imminent danger it presents, particularly the risk of collisions.