Greek National Road 1 ( el, Εθνική Οδός 1, abbreviated as EO1) is the old

single carriageway A single carriageway (British English) or Undivided highway (American English) is a road with one, two or more lanes arranged within a one carriageway with no central reservation to separate opposing flows of traffic. A single-track road has a s ...

road connecting

Athens Athens ( ; el, Αθήνα, Athína ; grc, Ἀθῆναι, Athênai (pl.) ) is both the capital and largest city of Greece. With a population close to four million, it is also the seventh largest city in the European Union. Athens dominates ...

with

Thessaloniki Thessaloniki (; el, Θεσσαλονίκη, , also known as Thessalonica (), Saloniki, or Salonica (), is the second-largest city in Greece, with over one million inhabitants in its metropolitan area, and the capital of the geographic region of ...

and Evzonoi, the border crossing between

Greece Greece,, or , romanized: ', officially the Hellenic Republic, is a country in Southeast Europe. It is situated on the southern tip of the Balkans, and is located at the crossroads of Europe, Asia, and Africa. Greece shares land borders ...

and

North Macedonia North Macedonia, ; sq, Maqedonia e Veriut, (Macedonia before February 2019), officially the Republic of North Macedonia,, is a country in Southeast Europe. It gained independence in 1991 as one of the successor states of Yugoslavia. It ...

. For most of its length, it has been replaced by the new A1 motorway.

Original route

According to the Government Gazette in 1963, the original alignment of EO1 ran from

Evzoni Evzonoi ( el, Εύζωνοι, , before 1927: Ματσίκοβο - ''Matsikovo'', , mk, Мачуково, bg, Мачуково, ''Machukovo'') is a town in Kilkis regional unit in Central Macedonia, Greece. The main border crossing between Gree ...

and the international border with what was then

Yugoslavia Yugoslavia (; sh-Latn-Cyrl, separator=" / ", Jugoslavija, Југославија ; sl, Jugoslavija ; mk, Југославија ;; rup, Iugoslavia; hu, Jugoszlávia; rue, label=Pannonian Rusyn, Югославия, translit=Juhoslavija ...

, via:

Decelea Decelea ( grc, Δεκέλεια, ), ''Dekéleia''), was a deme and ancient village in northern Attica serving as a trade route connecting Euboea with Athens, Greece. It was situated near the entrance of the eastern pass across Mount Parnes, which ...

, Sfendali (for

Malakasa Malakasa ( el, Μαλακάσα) is a village and former community of East Attica in Greece. Since the 2011 local government reform it is part of the municipality Oropos, of which it is a municipal unit. The municipal unit has an area of 10.450&nb ...

), Martino, Atalanti, Kamena Vourla,

Thermopylae Thermopylae (; Ancient Greek and Katharevousa: (''Thermopylai'') , Demotic Greek (Greek): , (''Thermopyles'') ; "hot gates") is a place in Greece where a narrow coastal passage existed in antiquity. It derives its name from its hot sulphur ...

Lamia LaMia Corporation S.R.L., operating as LaMia (short for ''Línea Aérea Mérida Internacional de Aviación''), was a Bolivian charter airline headquartered in Santa Cruz de la Sierra, as an EcoJet subsidiary. It had its origins from the failed ...

Stylida Stylida ( el, Στυλίδα; older Στυλίς, Stylis) is a town and a municipality in Phthiotis, Greece. The population of the municipal unit was 6,126 (2011). History First mention of the town of Stylida was during ancient times when the tow ...

, Almyros,

Velestino Velestino ( el, Βελεστίνο; rup, Velescir) is a town in the Magnesia regional unit, Thessaly, Greece. It is the seat of the municipality Rigas Feraios. Location It is situated at elevation on a hillside, at the southeastern end o ...

(for

Volos Volos ( el, Βόλος ) is a coastal port city in Thessaly situated midway on the Greek mainland, about north of Athens and south of Thessaloniki. It is the sixth most populous city of Greece, and the capital of the Magnesia regional unit ...

), Larissa, Tempe,

Katerini Katerini ( el, Κατερίνη, ''Kateríni'', ) is a city and municipality in northern Greece, the capital city of Pieria regional unit in Central Macedonia, Greece. It lies on the Pierian plain, between Mt. Olympus and the Thermaikos Gulf, ...

, Alexandreia,

Chalkidona Chalkidona ( gr, Χαλκηδόνα) is a municipality in the Thessaloniki regional unit, Greece. The seat of the municipality is Koufalia. The town is a hub for trucking traffic around the Thessaloniki area. Municipality The municipality Chalk ...

, Gefyra and

Polykastro Polykastro ( el, Πολύκαστρο, before 1928 , ''Karasoúli''; ''Pandektis: Name Changes of Settlements in Greece'', compiled by the/ref>) is a town and a former municipality in Kilkis regional unit of Central Macedonia, Greece. Since the 2 ...

Present route

Today, the A1 motorway has absorbed most of EO1's original alignment, although the EO1 continues to run alongside most of the A1 for non-motorway traffic. However, there is a motorway-only gap west of

Lake Yliki Lake Yliki ( el, Υλίκη ''Yliki'', Ancient Greek: Ὑλίκη ''Hylike'', Latinised as ''Hylica'') is a large natural lake of Boeotia, central Greece. Situated 8 km north of Thebes at 78 m elevation, it has been an important source of drinking ...

, requiring non-motorway traffic to detour via Thebes and Aliartos on the EO3. Additionally, the border crossing itself, north of Evzoni, is only open to motorway traffic.

Citations

1 Roads in Attica Roads in Central Greece Roads in Thessaly Roads in Central Macedonia {{Greece-road-stub