Subway passages are underground passageways that are used to transport people from one place to another. They are typically found in large cities and are often part of a larger public transportation system. The term 'subway passages' is often used interchangeably with the term 'TUBES, ' which is a five-letter word that can be used to describe these passages. Subway passages are usually made up of a network of tunnels, tracks, and stations that allow people to quickly and conveniently travel between different parts of a city.