Runway markings are essential visual aids on an airport runway that help pilots during takeoff and landing. These markings indicate important information such as runway boundaries, centerlines, and thresholds. They are painted in white or yellow and follow specific standards set by aviation authorities like the International Civil Aviation Organization (ICAO). Different types of runway markings serve various purposes. For example, the runway threshold marking shows the beginning of the usable runway, while the centerline marking helps pilots align their aircraft during landing. Properly maintained runway markings enhance safety and efficiency in airport operations.