Which of the following actions is NOT part of safe vehicle operation on the airfield?

Ignoring traffic signals is indeed not part of safe vehicle operation on the airfield. Adhering to traffic signals is crucial for maintaining order and safety, as these signals are designed to manage the flow of vehicles and prevent accidents, especially in a complex and busy environment like an airfield.

Traffic signals help communicate important information to drivers about when to stop and when it is safe to proceed, which is vital in an area where aircraft and other vehicles are continuously moving. Neglecting these signals could lead to dangerous situations, including collisions, as drivers may not be aware of the right-of-way or other users of the airfield.

In contrast, adhering to designated speed limits, using designated routes for driving, and following radio communication procedures are all critical components of safe vehicle operation. These practices are implemented to ensure that all airfield users can operate safely and efficiently, protecting both personnel and aircraft from harm.