Expressway S6 (in Polish droga ekspresowa S6) is a Polish highway which runs from the A6 autostrada near Szczecin, through Koszalin to Gdańsk, parallel to the Baltic coast, forming the main connection between Gdańsk and Szczecin.
Since June 2026, the entire route of A6/S6 from the German border to Gdańsk is open to traffic. Additionally, a new route of S6 forming the western bypass of Szczecin is under construction, planned to provide a parallel alternative to the existing route of A6 and S6 south-east of Szczecin.
History After World War I, the German HaFraBa association had already set up plans to build an Autobahn along the route from Berlin through the Polish Corridor, to the Free City of Danzig and East Prussia (today informally known as Berlinka). The construction was pushed by the Nazi authorities after 1933 as an extraterritorial Reichsautobahn across the Polish Corridor of prewar Poland further south than the modern S6 freeway has been planned for, but the road was never completed.
The first section of S6 built was the Obwodnica Trójmiejska (Tricity Bypass) from Gdańsk to Gdynia, which is long, followed by the section between Szczecin and Goleniów, both in the 1970s. The next part of S6 to be opened was bypass of Słupsk that was completed in October 2010.Kontrakty na budowę drogi ekspresowej S6 ze Szczecina do Gdańska (in Polish) ZnajdzPrzetargi.pl Retrieved 2026-03-12 The bypass of Nowogard was completed in December 2011, with the rest of the section between Szczecin and Koszalin open by 2019.
In July 2010, the route between Goleniów and Słupsk was finalised. It will be about long and pass just south of Kołobrzeg and then north of Koszalin.Article in Glos Szczecinski „Szóstka” z Goleniowa do Słupska będzie ekspresowa i przez Kołobrzeg The road will be a dual carriageway, with 27 interchanges and 130 viaducts, with about 20% of it overlapping the current route of National Road 6 (DK6). Doubts about financing made construction not expected to start before 2020,Rząd szykuje się na ograniczenie budowy dróg, but the schedule was later accelerated. The tenders for design-build contracts on the section between Goleniów and Koszalin were announced in August 2014, with expected completion around 2018. The section from Koszalin to Lębork was completed in 2025 and 2026.
Sections Expressway section Length Constructed Note Szczecin Zachód (A6) - Goleniów Północ (S3) 51 km 2026-2033Western bypass of Szczecin, under construction 20 km1976-1979Reconstructed to modern standard in 2020–2021, overlaps with S3 on this section. Goleniów Północ - Nowogard Zachód19.2 km2015–2019Opened April 2019 Nowogard bypass9.4 km2010–2011Opened December 2011 Nowogard Wschód - Kołobrzeg Zachód58.6 km2015–2019Opened November 2019 Kolobrzeg Zachód - Koszalin (S11)38.9 km Koszalin - Słupsk66.1 km2022–2025Opened December 2025 Słupsk bypass16.3 km2010–2025Opened December 2010 (one carriageway) and July 2025 (second carriageway) Słupsk - Leśnice42.5 km2021–2026Opened June 2026 Leśnice - Bożepole Wielkie22 km2021–2026Opened April 2026 Bożepole Wielkie - Gdynia (S7)41 km2019–2022Opened December 2022 Tricity 1st bypass 38.6 km1973–2008Built in stages starting in 1973, serves mainly the local traffic to and from Gdańsk. Since 2025, Tricity 2nd bypass (S7) is open, providing the more convenient route for the transit traffic around Gdańsk. See also A6 autostrada (Poland) Highways in Poland
References
External links Photo galleries for the construction of sections S6 between Koszalin and Gdańsk
Słupsk bypass Słupsk - Bobrowniki Bobrowniki - Skórowo Skórowo - Leśnice Leśnice - Bożepole Wielkie