This is part of "Attiki Odos", the motorway that connects Athens Airport with almost every suburb of the city. Here you see one of the rest areas, on the east section, near the airport.
The bridge over the road.
In almost the entire freeway, a railway is present in the middle where the suburban trains and metro are running.
Here is, also, the Holiday Inn hotel. A rather unusual place for a hotel like that, practically in the middle of nowhere, in fact is very convenient since it's only 10 minutes from the airport and 20 minutes drive from downtown Athens.
Attiki Odos in Wikipedia
Info about Attica Avenue
Holiday Inn Athens