It links Epirus and the city of Preveza on the north shore of the gulf with the cape of Aktio (Actium) in Aetolia-Acarnania, in Central Greece.

Completed in 2002, the tunnel is an important piece of infrastructure in an underdeveloped region, and greatly shortens the travel distance between the two sides of the gulf, which had been only possible by ferry.

The tunnel is a dual way carriage way and includes a 4.0 metre-wide side lane and a 1.3 metre wide pedestrian sidewalk in each direction.

The contracts was awarded in 1995, and construction was turned over to the Greek Ministry of the Environment, Physical Planning and Public Works in 1999.

[1] The tunnel is built in an area of severe seismic activity featuring complex geo-technical conditions.