What do white "zipper" lines signify?

White "zipper" lines are specifically used to indicate the crossing of vehicle corridors on airside areas of an airport. These lines serve as visual markers for drivers operating vehicles in proximity to runways and taxiways, ensuring they are aware of areas where they may need to yield or stop to avoid conflicts with aircraft movement. This safety measure is crucial for maintaining safe and efficient operations on the airside, where coordination between vehicle traffic and aircraft is vital. By clearly marking where vehicle corridors cross, these lines help prevent accidents and enhance overall situational awareness for vehicle operators navigating the busy airside environment.