What is the primary purpose of safety markings and signage on an airside area?

The primary purpose of safety markings and signage in an airside area is to effectively guide and inform vehicle operators while also indicating restricted zones. These markings and signs are vital for maintaining safety protocols and ensuring the smooth operation of airport activities. They provide clear visual cues to help vehicle operators navigate the complex environment of an airport, which includes runways, taxiways, and other critical areas.

Guiding and informing vehicle operators ensures that they understand their environment and follow the necessary regulations to avoid accidents. Signs that indicate restricted zones are equally important as they help prevent unauthorized access to sensitive areas, thereby ensuring security and safety. Together, these functions are essential for operational efficiency and the overall safety of the airport. This is why the combination of guiding vehicle operators and indicating restricted zones contributes to the correct answer.