The following is the number or various type of transit systems around the world including those under construction, excluding airport shuttles, commuter/mainline rail, entertainment parks and funiculars. Classification always brings areas of doubt, particularly in countries such as Japan and Switzerland where clear dividing lines just do not exist.
Metro (including SkyTrain) – 146
Light Rail – 98
Tramways (streetcars) – 445
Light Railways – 143
Heritage Tram – 51
Other (incl. monorails) – 27
Interesting to note that as of 2006, the light-rail family had 686 systems in operation.