A monorail is a type of railway that runs on a single rail, typically elevated above the ground. It is designed to transport passengers or goods efficiently in urban areas, often avoiding traffic congestion. Monorails can be powered by electricity and are known for their smooth and quiet operation. Monorails are commonly found in theme parks, cities, and airports, providing a convenient mode of transportation. They are often seen as a modern alternative to traditional trains and can be more environmentally friendly due to their reduced land use and lower emissions. Examples of monorail systems include the Seattle Center Monorail and the Tokyo Monorail.