Attiki Odos (
Greek ?tt??? ?d??) is a private-owned toll motorway in
Greece. The
Proastiakos high-speed suburban rail is almost entirely in the median through the main section. Its numbers are 6 for the main section, 64 for Imittos Ring and 65 for Aigaleo Ring. They are the outer
ring roads of
Greater Athens metropolitan area.
Construction of the project began in 1996. Part of the motorway was opened along with the Eleftherios Venizelos International Airport to which it connects, in 2001. It started from the Gerakas interchange and led to the airport.
In September 2002, the high-speed railway began construction, within the large median. In early 2003, Attiki Odos was opened from Kifissou Avenue Interchange (also known as National Road 1 / E75 Interchange) to Eleftherios Venizelos Airport; the Hymettus Ring was almost paved by this time, and tunnels were already complete.
On 3 September 2003, the Hymettus Ring opened. This part of the motorway runs in the northern part of Hymettus and became the road to bypass Mesogeion Avenue and link to Kifissou Avenue and its suburbs, and the Airport along with the eastern suburbs of Athens.
