In what scenario should an operator not use headphones while driving on the airside?

An operator should not use headphones while driving on the airside, even during low traffic times, because situational awareness is crucial for safety in such environments. Headphones can significantly impair an operator's ability to hear important sounds around them, including alarms, aircraft movements, and radio communications.

Even when traffic appears low, the airside environment can change rapidly, with the potential for vehicles or equipment to enter the area unexpectedly. Being able to hear warning signals and other auditory cues can help prevent accidents and ensure a safe operation. It's important for operators to remain fully aware of their surroundings at all times, regardless of perceived traffic conditions.