Tunnels

Aktio – Preveza Undersea Tunnel

Road tunnel under the mouth of the Ambracian Gulf, between Aktio and Preveza in western Greece. It is 1,570 m long: a 909 m immersed section, with 509 m of cut and cover on the Preveza side and 152 m on the Aktio side. The contract was awarded in 1995 and the tunnel was inaugurated on 28 June 2002. It is tolled.

Total length: 2 km
Open today: 2 km
Sections: 1

Sections

Sections of Aktio – Preveza Undersea Tunnel: status, length, dates, cost, funding and contractors
Sections	Status	Length	Timeline	Cost	Funding	Contractors	Contract terms
Aktio – Preveza undersea tunnel Wikipedia (English) gives the toll as EUR 3 as of January 2026. Cost sources disagree and none states an outturn: English Wikipedia gives an approximate construction cost of EUR 90 million, Greek Wikipedia a project budget of EUR 58,904,232.13, so no cost is recorded. Length measured from the OpenStreetMap way is about 1.74 km because it includes the approach ramps; the recorded 1,570 m is sourced. 1 2 3 Show on map →	Opened	2 km	1995Tender awarded Jun 28, 2002Opened	–	–	Christiani & Nielsen – Technical Company of General Construction (TCGC)Builder	–

Contractor roles are as recorded in the award. Only builders count toward the delivery rankings.

Sources

Wikipedia: Aktio–Preveza Undersea Tunnelread Oct 9, 2026
Greek Wikipedia: Υποθαλάσσια σήραγγα Πρέβεζας - Ακτίουread Oct 9, 2026
OpenStreetMap contributors (geometry, ODbL), way 322866174read Oct 9, 2026