The tram network is built almost exclusively on the streets of Helsinki, making it a traditional tram system rather than light rail.
The track gauge is one metre.
The network consists almost entirely of double track rail.
In some parts the tracks are separated from other road traffic; elsewhere they share road space with cars and buses.

The trams are powered with electricity conveyed by overhead wires.
Trams have their own traffic lights, distinguished from normal lights in that they are based on symbols of single colour: an upward-pointing arrow signifies "go", a horizontal line "prepare to stop" and the letter S "stop".
The traffic lights are synchronised to allow tram and bus traffic to flow relatively smoothly.
This system is called HeLMi (Helsinki Public Transport Signal Priority and Passenger Information).
The tram network is built almost exclusively on the streets of Helsinki, making it a traditional tram system rather than light rail. The track gauge is one metre. The network consists almost entirely of double track rail. In some parts the tracks are separated from other road traffic; elsewhere they share road space with cars and buses.
The trams are powered with electricity conveyed by overhead wires. Trams have their own traffic lights, distinguished from normal lights in that they are based on symbols of single colour: an upward-pointing arrow signifies "go", a horizontal line "prepare to stop" and the letter S "stop". The traffic lights are synchronised to allow tram and bus traffic to flow relatively smoothly. This system is called HeLMi (Helsinki Public Transport Signal Priority and Passenger Information).
Helsinki tram network