A621 motorway (Greece)

A621 motorway
A621 motorway
Αυτοκινητόδρομος Α621
	Route of the A621 motorway, in green
Route information
Length	2 km (1.2 mi)
Major junctions
South end	Gerakas (Stavros, A62)
North end	Doukissis Plakentias (A6)
Location
Country	Greece
Regions	Attica
Primary; destinations	Gerakas (Stavros); Doukissis Plakentias;
Highway system
	Highways in Greece; Motorways; National roads;

The A621 motorway (Greek: Αυτοκινητόδρομος Α621), formerly signed as the A642 motorway until 2024,^[1] is a short motorway in the Athens metropolitan area, Greece. It forms a connection between the A6 motorway (Attiki Odos) to the north, and the A62 motorway (Hymettus Peripheral Road, formerly signed as the A64 motorway) to the east.^[2] Its length is 2 km.

On 4 December 2015, the Greek government proposed to renumber the A642 as the A621:^[3] In practice, the renumbering had not taken place until 2024, because road signs were still showing the motorway as the A642. As of July 2024, the renumbering is being implemented due to road sign maintenance.^[1]

Exit list

Notes
	Under construction
	Planned

Regional unit	Exit	Name	Destinations	Notes/Also as
East Attica	Y4	Agia Paraskevi Interchange
East Attica	13	D. Plakentias Avenue interchange

Source: Attiki Odos,^[4] Motorway Exitlists^[2]

References

1 2 "Αντικατάσταση πινακίδων σήμανσης Αττικής Οδού" [Replacement of Attica Odos signs]. Odosimansi (in Greek). Thessaloniki. 11 March 2024. Archived from the original on 23 March 2026. Retrieved 8 October 2024.
1 2 "Exit list A642". Motorway Exitlists: A6. Retrieved 21 February 2015.
↑ Ministerial Decision DOY/oik/5776/2015, 4 December 2015 (FEK AAP' 253/21.12.2015, pp. 2097–2102). Archived from the original on 6 April 2025. Retrieved 28 October 2025.
↑ "Maps of Junctions". Attiki Odos. Retrieved 21 February 2015.

[a6-20240311-1] 1 2 "Αντικατάσταση πινακίδων σήμανσης Αττικής Οδού" [Replacement of Attica Odos signs]. Odosimansi (in Greek). Thessaloniki. 11 March 2024. Archived from the original on 23 March 2026. Retrieved 8 October 2024.

[exitlist642-2] 1 2 "Exit list A642". Motorway Exitlists: A6. Retrieved 21 February 2015.

[gra-list-2015-3] Ministerial Decision DOY/oik/5776/2015, 4 December 2015 (FEK AAP' 253/21.12.2015, pp. 2097–2102). Archived from the original on 6 April 2025. Retrieved 28 October 2025.

[4] "Maps of Junctions". Attiki Odos. Retrieved 21 February 2015.

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