A25 Thessaloniki – Serres – Promachonas
Vertical axis of the Egnatia Odos (part of E79, the approach to Pan-European Corridor IV), from the A2 at Lagkadas by way of Serres and Sidirokastro to the Bulgarian border at Promachonas. The operator gives 96 km; Greek Wikipedia gives 105 km measured from Derveni. Of the 96 km, 79 km were built new and opened in stages from 2001 under 14 contracts (budget EUR 465 million including VAT), and the other 17 km reused the existing National Road 12 (Lachanas – Serres), which has two lanes per direction and no hard shoulder. The last new section, 5 km between the Lefkonas and Kato Christos junctions, opened on 2 June 2017, which Greek Wikipedia gives as the official completion date. An operator page archived on 20 May 2013 gave 65 km open and 31 km under construction. The three lots are cut at junctions drawn from OpenStreetMap; no source found gives opening dates for the earlier sections.
- Total length
- 93 km
- Open today
- 93 km
- Sections
- 3
Sections
| Sections | Status | Length | Timeline | Cost | Funding | Contractors | Contract terms |
|---|---|---|---|---|---|---|---|
| Lagkadas (A2) – Serres (Lefkonas) Includes the Lachanas – Serres stretch that was part of the old National Road 12 (17 km of the axis reused existing road, with two lanes per direction and no hard shoulder). The twin Dorkada tunnel (288 m per Greek Wikipedia) opened in 2010 and lies inside this lot. No source found dates the opening of the sections before the last 5 km: 2017-06 is the latest bound, since the 2 June 2017 report calls the Lefkonas – Kato Christos stretch the last section under construction, and the real opening was earlier, in stages from 2001. Length measured from OpenStreetMap geometry, from the first Α25 way near the A2 at Lagkadas to the Serres (Lefkonas) junction. | Opened | 58 km |
| – | – | – | – |
| Serres (Lefkonas) – Kato Christos Stretch from the Lefkonas grade-separated junction to the Kato Christos junction, 5 km per the 2 June 2017 report. Drawn length 5.21 km. | Opened | 5 km |
| – | – | – | – |
| Kato Christos – Promachonas (Bulgarian border) Runs by way of Sidirokastro and Neo Petritsi to the Promachonas toll and border plaza. No source found dates the opening of its sections: 2017-06 is the latest bound, set by the official completion of the axis on 2 June 2017. The operator page archived on 20 May 2013 gave 65 km of the axis open and 31 km under construction, without naming the sections. Length measured from OpenStreetMap geometry. | Opened | 30 km |
| – | – | – | – |
Related projects
- HighwaysA1 Motorway Athens – Thessaloniki – Evzonoi (PATHE)Same country and category
- HighwaysA2 Egnatia Odos (Igoumenitsa – Kipoi)Same country and category
- HighwaysA27 Kozani – Ptolemaida – Florina – NikiSame country and category
- HighwaysA29 Siatista – Kastoria – KrystallopigiSame country and category
- HighwaysA5 Ionia Odos (Antirrio – Ioannina)Same country and category
- HighwaysA52 Amvrakia Odos (Aktio – Amvrakia)Same country and category
Corridors
The designations this project is recorded under. Both schemes are kept: the Pan-European corridors are how these projects were described when they were planned, and TEN-T is what EU money is allocated on today.
- Pan-European Corridor IVPan-European
Sources
- Greek Wikipedia: Αυτοκινητόδρομος 25 (Ελλάδα)read Oct 5, 2026
- Egnatia Odos A.E.: Ο Κάθετος Άξονας Θεσσαλονίκη – Σέρρες – Προμαχώναςread Oct 5, 2026
- Egnatia Odos A.E.: Ο Κάθετος Άξονας Θεσσαλονίκη-Σέρρες-Προμαχώνας (archived 20 May 2013)read Oct 5, 2026 · archived copy
- Εφημερίδα Μακεδονία: Ολοκληρώθηκε ο αυτοκινητόδρομος Θεσσαλονίκης-Σερρών-Προμαχώνα (2 June 2017)read Oct 5, 2026 · archived copy
- OpenStreetMap contributors (geometry, ODbL)read Oct 5, 2026
Figures last checked against their sources in Oct 5, 2026.