In searching for the optimal use of the railway company's financial resources (PKP PLK) and the time of planning the repairs of the tracks, a track durability model was created. The model in its assumptions is based on the technical and operational parameters of the railway line No. 131. The article presents two variants of the process of track durability. The first variant concerns the cleaning of the track, the second one concerns the upgrading. For both variants, the costs of works related to the cleaning and upgrading works of the tracks were determined and the impact of these variants on the environment was determined. The article also presents the scope of upgrading works and works related to the continuous repairs of the railway surface.