Sheffield tram (Supertram) approaching a stop in Church Street, Cathedral Quarter, Sheffield, Yorkshire, England

Sheffield Railway station seen from the east with Supertram stop in foreground and city centre behind, Granville Street, Sheffield, Yorkshire, England

View of bullet train in Kanazawa Station, Kanazawa City, Ishikawa Prefecture, Honshu, Japan

View of trains from the Lotus Tower, Colombo, Sri Lanka

View of trains from the Lotus Tower, Colombo, Sri Lanka

Elevated view of traffic and tram on major street during daytime, Hondori, Naka Ward, Hiroshima, Honshu, Japan

View of intricate rail and road network crossing, Minato City, Tokyo, Honshu, Japan

View of the Dubai metro rapid transit rail network and skyscrapers, Dubai, United Arab Emirates, Middle East

Punhung station, one of the many 100 metre deep subway stations on the Pyongyang subway network, Pyongyang, Democratic People's Republic of Korea (DPRK), North Korea, Asia

Intercity-Express ICE train, fastest on the network, on Hohenzollern railway bridge, Cologne, North Rhine-Westphalia, Germany, Europe

LUAS urban public transport light rail tram system, city of Dublin, Republic of Ireland, Europe

A blur of trains arriving and leaving London's Waterloo train station at dusk during rush hour.

Zoom view of trains leaving London's Waterloo train station.

View of London's Waterloo train station.

View of London's Waterloo train station.

The Virgin train crash site at Grayrigg near Kendal, Cumbria, England, United Kingdom, Europe

The Virgin train crash site at Grayrigg near Kendal, Cumbria, England, United Kingdom, Europe

Maglev train, Shanghai

Metro Shanghai, mass transportation system, subway, public transport, underground station, commuters

Metro Shanghai, Info screen, mass transportation system, subway, public transport, underground station, platformcommuters

Metro Shanghai, mass transportation system, subway, public transport, underground station, Guard, commuters

Intercity-Express train, ICE, and a regional train, suburban train, on the track, railway, track network next to the main railway station in Essen, Essen, North Rhine-Westphalia, Germany, Europe

Double-deck train, regional train, on the track, railway, track network next to the Essen main railway station, Essen, North Rhine-Westphalia, Germany, Europe

ICE, Intercity-Express train on the track, railway, track network next to the Essen main railway station, Essen, North Rhine-Westphalia, Germany, Europe

ICE, Intercity-Express train on the track, railway, track network next to the Essen main railway station, Essen, North Rhine-Westphalia, Germany, Europe

Suburban train on the track, railway, track network next to the Essen main railway station, Essen, North Rhine-Westphalia, Germany, Europe