Highways

A3 Struma Motorway

A 172.8 km motorway in southwestern Bulgaria running Sofia–Pernik–Blagoevgrad–Kresna–Kulata, from the capital to the Greek border on Pan-European Corridor IV (European route E-79). Its lots opened between 2013 and 2024; the Kresna Gorge bypass (Lot 3.2) was still under construction as of 2026.

Total length: 134 km
Open today: 119 km
Under construction: 15 km
Sections: 6
Cost on record: €411.539M; 2 of 6 sections carry a comparable figure

Restated into EUR at 2025 prices.

Sections

Sections of A3 Struma Motorway: status, length, dates, cost, funding and contractors
Sections	Status	Length	Timeline	Cost	Funding	Contractors	Contract terms
Dolna Dikanya – Dupnitsa 1 Show on map →	Opened	14 km	Sep 2011Construction start Jul 2013Opened	–	–	–	–
Dupnitsa – Blagoevgrad 1 Show on map →	Opened	34 km	Feb 2013Construction start Oct 2015Opened	–	–	–	–
Blagoevgrad – Krupnik 1 Show on map →	Opened	13 km	Aug 2017Construction start Feb 17, 2024Opened	Estimated лв186M(2017) Actual лв400M(2024)	–	–	–
Krupnik – Kresna (Kresna Gorge Bypass) 1 Show on map →	Under construction	15 km	Feb 2026Construction start Dec 2029Expected opening	Estimated лв570M(2026)	–	–	–
Kresna – Sandanski 1 Show on map →	Opened	18 km	Sep 25, 2015Tender awarded Dec 17, 2018Opened	Actual лв281M(2018)	–	–	–
Sandanski – Kulata 1 Show on map →	Opened	41 km	Apr 2012Construction start Aug 2015Opened	–	–	–	–

Related projects

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

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A3 Struma Motorway

Sections

Related projects

Corridors

Sources