The Panagopoula Tunnel ( el, Σήραγγα Παναγοπούλας) is a tunnel on the

Corinth Corinth ( ; el, Κόρινθος, Kórinthos, ) is the successor to an ancient city, and is a former municipality in Corinthia, Peloponnese (region), Peloponnese, which is located in south-central Greece. Since the 2011 local government refor ...

- Patras section of the Olympia Odos motorway. The name comes from the namesake area of Panagopoula. It consists of two separate sections, one which has a length of 4,018 m (Panagopoula 1) used by vehicles travelling from Patras to Athens, and one which has a length of 3,182 m (Panagopoula 2) used by vehicles travelling from the opposite direction, from Athens to Patras. Works began in 2008 along with the whole motorway, but they were halted in 2011. They were again resumed in early 2014. The 4 Km tunnel is the longest road tunnel of the whole

motorway A controlled-access highway is a type of highway that has been designed for high-speed vehicular traffic, with all traffic flow—ingress and egress—regulated. Common English terms are freeway, motorway and expressway. Other similar terms i ...

and the third longest in

Greece Greece,, or , romanized: ', officially the Hellenic Republic, is a country in Southeast Europe. It is situated on the southern tip of the Balkans, and is located at the crossroads of Europe, Asia, and Africa. Greece shares land borders ...

It was opened to traffic in late February 2017, a month earlier than the rest of the motorway.Panagopoula tunnels, article in Olympia Odos news magazine, Vol. 8, April 2015 (pdf file in Greek)
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References

{{Reflist Achaea Road tunnels in Greece