Before driving on a runway, it is crucial to?

Contacting the control tower for clearance before driving on a runway is essential for maintaining safety and operational integrity. The control tower is responsible for managing air traffic and ensuring that all ground vehicles and aircraft are coordinated effectively. This communication helps prevent collisions between vehicles and aircraft, as well as ensures that the vehicle operator is aware of any active operations on the runway.

While other factors like checking weather conditions or inspecting the apparatus are important in the broader context of operational readiness, they do not directly address the immediate safety protocols necessary for runway operations. Increasing engine speed is also not a factor that pertains to safety or protocol when entering a runway area. Thus, obtaining clearance from the control tower is the most critical action before proceeding onto the runway.