A taxiway centerline is a painted line on an airport taxiway that helps pilots navigate safely while taxiing their aircraft. It is typically a solid yellow line that runs down the center of the taxiway, guiding pilots to stay within the designated path. This is crucial for maintaining safe distances from other aircraft and airport infrastructure. The taxiway centerline is part of the larger system of airport markings and signs, which includes runway markings and hold lines. These markings are standardized by the International Civil Aviation Organization (ICAO) to ensure consistency and safety across airports worldwide.