Subway maps are available online from the websites of different regions' subway or transportation authorities, such as New York's Metropolitan Transportation Authority or the Washington Metropolitan Area Transit Authority. Urbanrail.net is one website that publishes maps of different U.S. and international subway lines.
Different transportation authorities are separately responsible for updating transit maps and information online for travelers related to stations, line frequency, fares and above-ground parking, as well as intercity buses. Users can search most online maps by subway line or station or use tools to plan custom trips and download sponsored apps.
The Urban Rail website addresses travel on subways and light rail worldwide but also provides maps and links for transportation with the United States. Users can click on a city's name to see subway routes and photos.