particularly those in Inner London. The Underground has largely resisted adding additional services to the standard Tube map and instead produces separate maps with different information, including: Standard Tube map: Shows all Underground, Overground, DLR, TfL Rail, Tramlink and Thameslink routes and stations, and fare zones. Large print Tube map: As above but with larger print. Walking distance map: Shows walking times between stations in the central London area. Toilet facilities map: Shows toilet facilities at stations. Bikes on trains map : Shows which routes allow bicycles to be taken on trains during peak times. Night Tube map: Shows Night Tube services. Avoiding stairs Tube guide: Shows which stations have lifts, escalators or ramps to platforms. Tube Map Showing Tunnels: Shows sections of lines that are in tunnel. Designed to help users with claustrophobia or other anxiety conditions. London Connections map: Produced by the Association of Train Operating Companies (ATOC), this provided the same information as TfL's Travelcard Zones map but extended further beyond fare zones 7–9. National Rail lines were emphasised by thicker lines and coloured according to their train operating company (TOC). This map was replaced by the Oyster Rail Services map. Maps are produced in different sizes, the most common being Quad Royal (40 × 50 inches) poster size and Journey Planner pocket size. The maps showing all the National Rail routes provide useful additional information at the expense of considerably increased complexity, as they contain almost 700 stations. Non-Underground lines on standard map Some non-Underground lines have appeared on the standard tube map: On the early maps that used a geographic background, mainline railways were shown as part of the background detail. Prior to its transfer to the London Underground in 1994, the Waterloo & City line was operated by British Rail and its mainline predecessors but has appeared on most Tube maps since the mid-1930s. For a short period in the late 1930s to 1940, the section of the West London line linking Willesden Junction to the Metropolitan line's Middle Circle route at Uxbridge Road was shown as a service operated by the Great Western Railway and the London, Midland and Scottish Railway. The service was removed when the line closed to passengers in 1940. This section of the line is today shown as part of the London Overground. The North London line was added to the map in 1977. Although run by British Rail