Attiki Odos (Greek: Αττική Οδός) (Attica Road) is a toll motorway system in Greece.

In early 2003, the A6 was opened from Kifisias Avenue Interchange to Eleftherios Venizelos Airport; the Ymittos Ring was almost paved by this time, and tunnels were already complete.

[1][2] Its design used strict safety-related technical specifications, including updated hard shoulders in both directions and high quality skid-resistant asphalt pavement, dense lighting and fencing.

Attiki Odos has hundreds of CCTV cameras connected to the Traffic Management Centre (TMC), which detects any incidents occurring on the motorway and informs the intervention and maintenance patrol units to provide assistance.

Other sophisticated safety systems include: Article 50 of the concession contract, as ratified by Law 2445/1996, requires drivers to pay a toll to use the A6, A62 (Hymettus Ring Road) and A621.