Greek National Road 51

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National Road 51
Εθνική Οδός 51
Route information
Length	128 km (80 mi)
Major junctions
North end	Kastanies
South end	Ardani
Location
Country	Greece
Regions	East Macedonia and Thrace
Major cities	Didymoteicho, Orestiada
Highway system
Highways in Greece Motorways National Roads

Greek National Road 51 (Greek: Εθνική Οδός 51, abbreviated as EO51) is a predominantly single carriageway road in the Evros regional unit of Greece. The road is a branch of the EO2 from Alexandroupolis and runs almost parallel to the Evros river from Ardani in the south to Kastanies in the north, before meeting the D.100 road at the Greece–Turkey border towards Edirne. The EO51 is about 128 km long, and forms part of the European route E85.^[1]