Motorway 6 or Attica Motorway or Attiki Odos is a privately owned toll motorway in Greece, part of the Attiki Odos system. Connecting Eleusis in the west with the Athens International Airport in the east, it forms the northern beltway of Athens. The length of the motorway is 48 kilometres (30 mi).

Elefsina or Eleusis is a suburban city and municipality in Athens metropolitan area. It belongs to West Attica regional unit of Greece. It is located in the Thriasio Plain, at the northernmost end of the Saronic Gulf. North of Elefsina are Mandra and Magoula, while Aspropyrgos is to the northeast.