There are two types of airfield signage
Yellow on black background. Identifies the runway, holding point or taxiway currently on/at or entering.
Black on yellow background. Identifies the intersecting taxiways the aircraft is approaching, with an arrow indicating the direction to turn.
White on a red background. These signs identify a runway intersection ahead. A red runway Marker Board is positioned at the entrance to the runways. It is illuminated at night and provides a warning to aircraft and vehicles that they are approaching a runway.
These are regulated by ICAO and are painted white on runways and yellow on taxiways. Examples of taxiway markings are taxiway centrelines and CAT 1,2 and 3 holding points situated across the entrance to runways.
