Elements of the tramway track that require special attention in the design and maintenance of the tramway infrastructure are sharp curves (curves with small radii). In such places, there are a number of unfavourable operational problems, which are discussed in the article below. It describes the characteristics of such geometric elements and analyses the interaction of the wheel-rail system. Moreover, the most important operational problems are presented, such as the wear of wheels and tramway rails, the buckling of the rails, and noise and vibrations occurring during the passage of the tram. Methods of reducing unfavourable phenomena occurring on curves in the tramway infrastructure were also highlighted.

The paper presents various ways of protection from traffic noise used in railway infrastructure in Poland. The sources of noise in rail and tram transport were discussed. Also commonly found solutions on the railway network were analyzed such as noise barriers and rail dampers. Modern tram surfaces have been presented as one of the noise protection methods in the tram infrastructure. In the tram infrastructure a noise protection method was presented in the form of tram track lubricators on sharp curves. In addition, the effectiveness of noise protection methods was assessed on the basis of tests and research.

In the paper the impact of the amendment to national regulations - “Rozporządzenie w sprawie warunków technicznych, jakim powinny odpowiadać skrzyżowania linii kolejowych oraz bocznic kolejowych z drogami I ich usytuowanie” is discussed from the point of view of design process. The revision came into force on 16th October 2018, introducing many changes to the design of level crossings. In the article the authors discuss the changes with regards to the visibility conditions, the intersection angle, the longitudinal profile of the road and the railway line. In addition, the issue of the road and railway track routing in the horizontal plane is discussed.

This paper describes the possibilities of using BIM (Building Information Modeling) technology based on object modeling in transport infrastructure projects. The main focus was on investments such as roads and railways. The objectives of implementing this technology were presented and its benefits for participants of the construction process were discussed. The basic principles, norms and documents related to the BIM methodology have been outlined. Then it was described at what stage the introduction of this technology is on the Polish market. Finally, examples of "implementation" projects currently implemented by the main managers of the rail and road network in Poland, ie PKP PLK and GDDKiA, were shown. Keywords: civil engineering, BIM, infrastructure.

Paper discussed the design of railway turnouts on curves and transition curves. The article describes the current legal status and the origin of national regulations. In addition, the rules for the design of turnout connections on curves and transition curves, calculations of curves in turnout and speeds in turnout directions are presented in accordance with PN-EN 13803 "Railway - Track - Track design parameters in the plan - Track with a width of 1435 mm and larger " as well as „Standardy Techniczne - szczegółowe warunki techniczne dla modernizacji lub budowy linii kolejowych do prędkości Vmax ≤ 200 km/h (dla taboru konwencjonalnego) / 250 km/h (dla taboru z wychylnym pudłem) „ ST-T1-A6 Układy geometryczne torów”.