Highways in Greece

Motorways and National Roads in Greece constitute the main road network of the country. These two types of roads are distinct in terms of their construction and capacity specifications. Their main differences are that motorways (Greek: Αυτοκινητόδρομος, Aftokinitódromos) adhere to higher quality construction standards, allowing for higher sustained speeds and increased traffic compared to national roads (Greek: Εθνική Οδός, Ethnikí Odós). Expressways denote a specific highway standard intermediate between motorways and national roads, and can be designated as either.

The construction of the Greek motorway network has been, to a large extent, a very complex and demanding project due to the peculiarities of the geomorphology of the areas through which the new roads pass. The Greek mainland is extremely mountainous; the local topography as well as environmental concerns regarding the local flora and fauna played a decisive role in the final route design.

In order to overcome these difficulties, the construction of multiple large and expensive technical works, such as tunnels and bridges, was necessary in many cases. Indicatively, the total number of tunnels built along the six Greek major motorways (A1, A2, A3, A5, A7 and A8) is about 150 and their total length is about 200 km (measured as a single bore).

With a total length of about 2,528 km as of 2025, Greece's motorway network is the largest in Southeastern Europe and one of the most advanced in Europe.