Which of the following is NOT a safe practice while operating a vehicle on the airfield?

Ignoring speed limits when in a hurry is not a safe practice while operating a vehicle on the airfield. Speed limits are established to ensure the safety of all personnel and equipment in the vicinity, including aircraft and ground support vehicles. Adhering to these limits is crucial because airfields can be busy environments where unexpected situations may arise. Speeding can reduce a driver's ability to react in time to prevent accidents and can endanger not only the driver but also others on the airfield.

In contrast, checking for aircraft before proceeding, driving slowly and attentively, and using designated taxiways and routes are all safe practices that promote safety and situational awareness on the airfield. These actions help to prevent collisions and ensure that all vehicles operate in a predictable and secure manner.