Editing Tram (section)

===Track gauge===
{{main|List of tram systems by gauge and electrification}}
Historically, the [[track gauge]] has had considerable variations, with [[narrow gauge railways|narrow gauge]] common in many early systems. However, most light rail systems are now [[standard gauge]]. An important advantage of standard gauge is that standard railway maintenance equipment can be used on it, rather than custom-built machinery. Using standard gauge also allows light rail vehicles to be delivered and relocated conveniently using freight railways and locomotives.

Another factor favoring standard gauge is that low-floor vehicles are becoming popular, and there is generally insufficient space for wheelchairs to move between the wheels in a narrow gauge layout. Standard gauge also enables – at least in theory – a larger choice of manufacturers and thus lower procurement costs for new vehicles. However, other factors such as electrification or [[loading gauge]] for which there is more variation may require costly custom built units regardless.

{{multiple image
| align             = right
| direction         = horizontal
| image1            = Tram lyon 04.jpg
| width1            = 200
| footer            = Tram stops can range from purpose-built, tram-exclusive facilities (left), to simple stops within a public road (right).
| image2            = Straßenbahnlinie 14, Oppenheimer Landstraße.jpg
| width2            = 180
}}