[3] STASY operates a fleet of 25 Alstom Citadis and 35 Sirio vehicles,[4] which serve two tram lines and 60 stops.

[1] A standard gauge tram system was built by the Hellenic Electric Railways, from the perimeter of the Piraeus Harbour to Perama.

[1][6] The company started the construction of the initial network in the beginning of 2002, and was opened by Michalis Liapis (Minister for Transport and Communications) on 19 July 2004, a few weeks prior to the 2004 Summer Olympics in Athens.

[9] From 19 October 2018 to 20 November 2020, tram services were suspended between Syntagma and Kasomouli, due to concerns over subsidence in the underground riverbed of the Ilisos:[10][11][12] services from Stadio Irinis & Filias to Edem and Mousson were also suspended from 16 March 2020 to 21 January 2021, due to realignment works associated with the Faliro Waterfront regeneration project.

[15][16] From 28 November 2019, trams heading towards Faliro terminated at Gipedo Karaiskaki instead of Stadio Irinis & Filias, before running out of service towards Akti Poseidonos.

But in 2018 a combined backlash by both local organisations and municipal governments halted the aforementioned plans, with now a new metro line being suggested instead.

[21] Purchased tickets are valid for 90 minutes (1 hour 30 minutes) after validation and can be used for several rides for all means of public transport in Athens including the metro, buses, and the urban part of the suburban railway (between Piraeus, Magoula and Koropi stations, excluding the airport).

A majority of the stops are within the South and Central Athens regional units: thirteen are in Piraeus, and one is in Voula.

[4] To support the extension of the system into the centre of Piraeus, an order was placed in July 2018 for 25 Alstom Citadis 305 trams, delivery of which began in September 2020 and ended in December 2021.