S6 expressway (Goleniów – Koszalin – Słupsk – Gdynia, Trasa Kaszubska)

First of three lots of the western bypass of Szczecin (Zachodnia Obwodnica Szczecina) on S6. Contract signed on 16 January 2026 with PORR for 776.8 million PLN (GDDKiA Szczecin, VAT basis not stated); the MSBD page gives the contractor and date but no value. The lot starts at the link with the Przecław and Warzymice bypass on DK13 and the A6 junction and ends at the Dołuje junction, about 900 m north of DK10. The tender was announced on 17 December 2024 and the offer chosen on 27 October 2025; the MSBD page gives 2026–2029, and the GDDKiA news item of 21 April 2026 gives 13.9 km for this lot. The centreline is drawn from the OpenStreetMap construction ways (one carriageway) and is 9% shorter than the sourced 13.6 km. Works were planned to start in May 2026 (GDDKiA, 21 April 2026).

Second lot of the western bypass of Szczecin. Contract signed on 21 April 2026 with NDI for 694.8 million PLN (GDDKiA Szczecin, VAT basis not stated); the MSBD page gives the contractor and date but no value. Includes the Dobra and Tanowo junctions, the Sławoszewo rest area and 14 bridge structures. GDDKiA places the end of the lot 1.5 km before the Police junction, but the OpenStreetMap construction ways run further than the two sourced lengths add up to, so the boundary with the next lot is cut at the sourced 11.9 km from the Dołuje junction and is approximate.

Third lot of the western bypass of Szczecin, with a 5 km road tunnel under the Odra (GDDKiA). Contract signed on 18 May 2026 (MSBD) for 5.3 billion PLN, the largest in the history of GDDKiA (GDDKiA Szczecin, 22 May 2026; VAT basis not stated). The MSBD page gives 2026–2033. Ends at the Goleniów Północ junction, where S3 and the next lot begin, with new Police and Modrzewie junctions and the Bolesławice rest area. Drawn from the OpenStreetMap proposed ways (one carriageway), which map the tunnel at about 3 km; the drawn line is 10% longer than the sourced 23.4 km because the western boundary is approximate (see the previous lot).

First section of the Szczecin – Koszalin project. It starts at the Goleniów Północ junction, where S3 ends (S3 is drawn in pl-s3, so this lot does not repeat it), and runs to the Nowogard Zachód junction, where the Nowogard bypass begins. Design-build contract signed on 29 September 2015 with Budimex for 424 million PLN (pl.wikipedia, VAT basis not stated); the MSBD page shows 356.07 million PLN as the contract value. Length is the MSBD figure; pl.wikipedia gives 19.2 km. The drawn length is within 5%. Opened on 8 May 2019 with new Goleniów Lotnisko and Osina junctions and a rebuilt Goleniów Północ junction. The Kołbaskowo – Goleniów western bypass of Szczecin that extends S6 westwards is drawn as the three lots before this one.

Northern bypass of Nowogard on DK6, built in 2010–2012 by Budimex and now part of S6. Works began in April 2010 (pl.wikipedia); the MSBD page gives 22 December 2011 as the date the road was made available, and pl.wikipedia says the whole bypass was opened on 20 February 2012. The two sources disagree on the value: MSBD shows 228 million PLN and pl.wikipedia 132.4 million PLN net, so no contract value is recorded. The sourced 9.4 km runs from Olchowo past Warnkowo to Wojcieszyn and extends beyond the two junctions at which the lot is cut, so the drawn centreline is about 23% shorter.

Design-build contract signed on 23 October 2015 with Mosty Łódź for 390,246,867.54 PLN (pl.wikipedia, VAT basis not stated); the MSBD page shows 399.74 million PLN. Built largely along the old DK6. Traffic ran on one carriageway from 22 August 2019 and on both from 30 October 2019 (GDDKiA). Length is the MSBD figure of 20.36 km; pl.wikipedia gives 20 km. The drawn centreline, cut at the Nowogard Wschód and Płoty junctions, is about 15% shorter. The contract boundary with the next lot lies inside the Płoty bypass area, not at a junction, so the two lots together (34.9 km drawn) match the two sourced lengths (34.96 km) better than either does alone.

Design-build contract signed on 6 October 2015 with Budimex for 253,995,000 PLN (pl.wikipedia, VAT basis not stated); the MSBD page shows 284.67 million PLN. Starts at the end of the Płoty bypass and ends at the Kiełpino junction, with new Wicimice (DW112) and Kiełpino (DW105) junctions. The drawn centreline starts at the Płoty junction, so it is about 18% longer than the sourced 14.6 km; see the previous lot.

Design-build contract signed on 9 October 2015 with a consortium of Polaqua and Dragados for 455,042,180 PLN (pl.wikipedia, VAT basis not stated); the MSBD page shows 459.53 million PLN and 24.1 km. Includes the Kołobrzeg Zachód junction (DW162) and the Jarkowo rest areas. The MSBD page gives the opening date as 30.09.2020, which is a typo for 2019: GDDKiA states that the stretch opened on 30 September 2019.

Contract signed on 20 November 2015 with PORR for 342,921,540 PLN (pl.wikipedia, VAT basis not stated); the MSBD page shows 353.93 million PLN. Length is the 14.7 km of S6 given by pl.wikipedia; the contract also covered about 2 km of Kołobrzeg bypass on DK11, and the MSBD page gives 16.54 km for the whole task. Part of this run is shared with S11, which pl.wikipedia marks from the Kołobrzeg Wschód junction to the Koszalin bypass.

Design-build contract signed on 29 October 2015 with a consortium of Strabag Infrastruktura Południe and Strabag for 436,844,659.80 PLN (pl.wikipedia and MSBD, VAT basis not stated). Runs from Ustronie Morskie (junction not included) to the Bielice junction (not included). The MSBD page gives 10 October 2019 as the date the main line was made available and 7 September 2020 for the permanent traffic arrangement.

Contract signed on 3 March 2016 with a consortium of Porr Polska Infrastructure and Polbud-Pomorze for 645.6 million PLN (pl.wikipedia, VAT basis not stated); the same article cites 690.71 million PLN at signing and 793.14 million PLN as of 23 October 2019, and the MSBD page gives 764.62 million PLN for the works. The contract covered the whole Koszalin and Sianów bypass, including the next lot, a 1.9 km S11 link from Bielice to Koszalin Zachód (not drawn) and the end section east of the Sianów Wschód junction, so the value is not split by lot. The stretch between Koszalin Wschód and Sianów Zachód was later removed from it (see that lot). Sourced length is 5.7 km (pl.wikipedia); the drawn centreline between the Bielice and Koszalin Północ junctions is 3.2 km, and pl.wikipedia places the two junctions at km 147 and km 149. The MSBD page gives 13.2 km for the three opened parts together (this lot, the S11 link and the end section east of Sianów Wschód) and starts its section 2 at km 6+400, which puts Koszalin Wschód about 6.4 km from the start of the bypass, so this lot is probably nearer 3.4 km than 5.7 km; MSBD gives no figure for the lot alone. The sourced length is kept.

Built under the 3 March 2016 contract described on the previous lot, whose value is recorded there. Opened on 29 November 2019 (pl.wikipedia; GDDKiA had announced on 10 October 2019 that this part of the bypass would follow by the end of October). Sourced length is 3 km; the drawn centreline is 3.0 km.

Last stretch of the Koszalin and Sianów bypass. It was part of the 3 March 2016 contract (see Bielice – Koszalin Północ), but unexpected groundwater near Góra Chełmska stopped work, a replacement design-build tender announced on 3 October 2018 was not decided, and the works were re-let separately. The MSBD page records a works contract signed on 20 July 2021 for 448,877,889.58 PLN (VAT basis not stated) covering 7.9 km (km 6+400 to km 14+300) of the bypass, and still showed the status as under construction when read. GDDKiA announced the opening of this nearly 5 km stretch on 15 June 2024. The 5 km length is from pl.wikipedia and GDDKiA; the drawn centreline is 4.9 km.

The Sianów Zachód junction at Gorzebądz was added to the design so that a stretch already built could serve as the northern bypass of Sianów. pl.wikipedia gives an opening date of 8 July 2023 and a cost of about 22.3 million PLN without stating its scope, so no cost is recorded. GDDKiA writes that the bypass of Sianów was handed over in July 2023.

Contract signed on 30 September 2022 with Przedsiębiorstwo Budowy Dróg i Mostów Kobylarnia and Mirbud for 657,935,862.92 PLN (MSBD, VAT basis not stated); tender announced on 6 September 2021, offer chosen on 2 September 2022. Opened to traffic on 22 December 2025. The MSBD section ends at the start of the Sławno bypass, at the Sławno Zachód junction (named Bobrowice in the MSBD title).

Contract signed on 17 November 2022 with Stecol Corporation for 701,635,369.87 PLN (MSBD, VAT basis not stated); tender announced on 1 September 2021, offer chosen on 30 September 2022. Includes the Sławno bypass, from the Sławno Zachód junction to the start of the Słupsk bypass at Słupsk Zachód (junction not included).

Southern bypass of Słupsk, built from 19 August 2008 by Strabag and Wakoz and opened on 26 October 2010 with a single carriageway (pl.wikipedia); the MSBD page records about 12 km for this first carriageway. The second carriageway, about 9.5 km, was built under a design-build contract signed on 28 May 2021 with Strabag for 128,440,271.21 PLN (MSBD, VAT basis not stated), works finished on 28 April 2025, and it opened on 4 July 2025. It is part of the Słupsk – Bożepole Wielkie project. The upgrade is not a separate lot, so the old road stays opened. The drawn centreline is 12% shorter than the 16.3 km given by pl.wikipedia.

Design-build contract signed on 29 December 2021 with NDI, NDI Sopot and Todini Central Asia for 548,743,636.72 PLN (MSBD, VAT basis not stated). Starts at the end of the Słupsk bypass at Redzikowo and ends at the Bobrowniki junction (included), with the Damnica junction (called Budy in earlier plans). The three Słupsk – Leśnice contracts, 16.1, 13.1 and 10.9 km, had a combined value of 1.27 billion PLN according to GDDKiA; the lots opened together on 26 June 2026, the date of the GDDKiA report that they were open.

Design-build contract signed on 29 June 2021 with Aldesa Construcciones Polska and Aldesa Construcciones for 283,199,309.17 PLN (MSBD, VAT basis not stated). Junctions Rzechcino and Skórowo; the Łupawa valley viaduct (245 m) is the longest structure on the new S6 according to GDDKiA. Most of the route runs through undeveloped land, not beside the old DK6.

Design-build contract signed on 15 June 2021 with Intercor for 344.4 million PLN (MSBD, VAT basis not stated). Ends at the Leśnice junction, where the Trasa Kaszubska begins. The contractual completion date was 15 May 2025; the section opened on 26 June 2026.

Design-build contract signed on 29 July 2021 with Budimex for 718,669,944.83 PLN (MSBD, VAT basis not stated). The road permit (ZRID) was issued on 12 January 2023. Three junctions (Lębork Zachód, Lębork Wschód, Łęczyce) and 28 structures including two viaducts, according to pl.wikipedia. The contractual completion date was 29 June 2025; opened on 29 April 2026.

Design-build contract signed on 11 June 2018 with PORR for 337,981,735.78 PLN (MSBD, VAT basis not stated), the price of the offer chosen on 30 April 2018. The offer allowed 31 months, not counting the winter periods of 15 December to 15 March. Junctions Bożepole Wielkie, Strzebielino and Luzino, and the Luzino road maintenance depot. The sourced 10.4 km starts at the village of Bożepole Wielkie and ends beyond the Luzino junction; the drawn centreline between the two junctions is 11% shorter.

Design-build contract signed on 11 June 2018 with Budimex for 341,958,104.35 PLN (MSBD, VAT basis not stated). On 17 April 2018 GDDKiA chose the Budimex offer again, at 335,873,785.14 PLN for 34 months (not counting winter periods) and a 10-year guarantee, after the National Appeals Chamber had annulled an earlier choice. The section starts after the Luzino junction and ends beyond the Szemud junction. The sourced 10.3 km is 4% longer than the drawn centreline.

Design-build contract signed on 26 March 2018 with Polaqua for just over 817 million PLN (GDDKiA, 26 March 2018; VAT basis not stated); the MSBD page shows 704.87 million PLN as the contract value. Junctions Koleczkowo, Chwaszczyno and Gdynia Wielki Kack, plus the rebuilt Wielki Kack junction. Length is the 20.19 km of new expressway; the MSBD page adds about 2.9 km of rebuilding on the existing Obwodnica Trójmiasta, which is not counted. From the Chwaszczyno junction to Wielki Kack the road is shared with S7 (OpenStreetMap tags it S6;S7) and has three lanes each way. The S7 Obwodnica Metropolii Trójmiejskiej (Chwaszczyno – Gdańsk Południe, pl.wikipedia) starts at the Chwaszczyno junction and is the lot chwaszczyno-gdansk-poludnie in pl-s7, which does not draw this shared stretch, so it is not marked as shared here. The drawn line passes within about 100 m of the S7 line at the Chwaszczyno junction ramps.