Motorway 21 (Greece)
Template: Infobox trunk road / Maintenance / GR -A
Periferies (regions):
East Macedonia and Thrace
The Aftokinitodromos 21/Αυτοκινητόδρομος 21 (Greek for, highway 21 ') is a planned Greek highway. It is to run from the Bulgarian border at Ormenio to Highway 2 at Ardanio while 51 and 52 replace the existing national roads.