What is the purpose of mandatory signs on the airside?

Mandatory signs on the airside serve a crucial function by conveying essential information and instructions to vehicle operators. These signs are designed to ensure safety and compliance with operational standards in an area where various types of vehicles and aircraft interact. They provide direction on rules that must be followed, such as speed limits, driving behaviors, and areas that require specific procedures.

These instructions help maintain order and safety on the airside, where the risks associated with vehicle operations can be significant due to the presence of aircraft and other ground service vehicles. By clearly displaying vital information, mandatory signs help prevent accidents and ensure that all personnel operating vehicles understand their responsibilities in the environment they are in. This is essential for maintaining a secure and efficient operation in such a high-traffic area as an airport's airside.