Airport Surface Detection Equipment, Model X, or ASDE-X,'s a runway-safety tool that enables air traffic controllers to detect potential runway conflicts by providing detailed coverage of movement on runways and taxiways. By collecting data from a variety of sources, ASDE-X's able to track vehicles and aircraft on airport surfaces and obtain identification information from aircraft transponders. Operation The data that ASDE-X uses comes from a surface movement radar located on the air traffic… (More on Asde-x)