A runway is a long, flat strip of land at an airport where aircraft take off and land. It is designed to support the weight of planes and is usually made of asphalt or concrete. The length and width of a runway can vary depending on the types of aircraft it serves, with larger planes requiring longer runways for safe takeoffs and landings. Runways are marked with specific lines and numbers to guide pilots during their approach and departure. These markings help ensure safety and efficiency in air travel. Each runway is also equipped with lighting systems, such as runway lights, to assist pilots during nighttime operations or in poor weather conditions.