On behalf of PKP PLK S.A. we renovated the executive signal box at the Puszcza Mariańska station at km 12.788 of railway line No. 12.

The renovation of the signal box included, among others: installation of gypsum plasters, replacement of water and sewage installations, installation of stoneware tiles and glazed tiles, replacement of windows and doors, roof covering, wall insulation, installation of stairs, installation of surface-mounted electrical installation, installation of electric heating, air conditioning of control room rooms, design and construction of a deep well.