The Greek capital Athens (the metropolitan area has almost 4 million inhabitants) has beside an approx. 80 kilometre long metro network also three tram routes with a length of almost 30 kilometres in the southeast of the borough. Up to the year 2000, the city had only one single underground route. Apart from that, public transport was operated exclusively with busses, which led to accordingly traffic problems. A former tram in Athens was abandoned in 1960, it was reintroduced for the Olympic Games in 2004.
The operator of the tramway and metro is called → STASY (ΣΤΑΣΥ)
, the buses and trolley buses are operated by the OSY (ΟΣΥ). Both cooperate in the Transportation Authority OASA (ΟΑΣΑ).