29/06/26
Soletanche Polska will participate in the delivery of one of the most important infrastructure projects in the Świętokrzyskie region – the S74 expressway section Przełom/Mniów – Kielce, on the stretch between Kielce (S7 Kielce Zachód interchange) and Kielce (National Road No. 73). The project is being carried out under the “Design and Build” formula. The contracting authority is the General Directorate for National Roads and Motorways (GDDKiA), Kielce Branch, while Soletanche Polska will perform geotechnical and foundation works on behalf of the general contractor, INTERCOR Sp. z o.o.
The investment is a key component of the expansion of the transport network of Kielce and the entire region. Its primary objective is to improve transit traffic flow, reduce congestion in the city centre, and enhance the connection between the S7 expressway, the south-eastern part of Kielce and National Road DK73.
The new nearly 5-kilometre-long section of the S74 will connect two major interchanges: Kielce Zachód (S7) and Kielce Bocianek, previously constructed as part of the S74 Kielce – Cedzyna section. The project also includes the construction of two new interchanges – Kielce Herby and Kielce Skrzetle – as well as two tunnels, including one approximately 500 metres long between Klonowa and Warszawska streets. In addition, the investment covers the construction of viaducts, roundabouts and new access roads.
An important part of the project will also be the accompanying urban infrastructure: approximately 13 km of sidewalks, 10 km of bicycle paths and bus bays, significantly improving urban mobility and road safety.
The S74 section in the Kielce area is considered one of the most challenging parts of the entire route due to its urban character, dense development and complex ground conditions.
Scope of Soletanche Polska works
The start of geotechnical and foundation works is planned for early July 2026. The scope includes:
- diaphragm walls together with detailed design and construction methodology,
- CFA pile palisades,
- DSM columns,
- ground improvement using jet-grouting pressure injection,
- jet-grouting bottom sealing plug,
- comprehensive geotechnical works.
As Emilia Błach, Commercial Director – Major Projects Department at Soletanche Polska, emphasizes: “The S74 expressway section is another important infrastructure project in Soletanche Polska’s portfolio. We have built our experience while delivering key road and urban infrastructure projects in Poland, including the Konotopa Interchange on the A2 motorway in Warsaw, the S2 expressway together with the Airport Interchange, the Cross-city Route in Grudziądz, as well as engineering structures along Jasnogórska Street in Kraków and Graniczna Street over the Popiełuszki Route in Płock. Thanks to our expertise in diaphragm walls, piling works and advanced ground improvement technologies such as DSM and jet-grouting, we are fully prepared to deliver even the most demanding infrastructure projects.”
The S74 investment in Kielce is one of the key road infrastructure projects in Poland and will significantly contribute to the development of the regional transport network and improve traffic flow within the urban area.
