A Subway Map is a visual representation of a city's underground train system, designed to help passengers navigate the network easily. It typically shows the different subway lines, stations, and connections, often using color-coded lines to distinguish between routes. The map simplifies complex routes and provides essential information about travel times and transfers. Subway maps are commonly found in urban areas with extensive public transportation systems, such as New York City, London, and Tokyo. They are essential tools for commuters and tourists alike, making it easier to plan journeys and understand the layout of the subway system.