NDI SA was the general contractor of the project titled: Revitalization of railway line No. 171 on the Dąbrowa Górnicza Towarowa – Dąbrowa Górnicza Wschodnia section and line No. 661 on the Dąbrowa Górnicza Towarowa – Kozioł route as part of the investment project titled: “Works on the South-Eastern GOP Ring Road along with adjacent sections.”