The article discusses about the road infrastructure and its evolution from 1989 to the present day, as well as plans for further expansion of both the public road network and the national road network until 2020/2030.

The article concerns the discussion of a pneumatic tail lift entirely powered by pneumatic devices powered with compressed air from the brake system of truck. The authors try to set up the drive parameters and the size of the engines. For this purpose, a computer simulation of the platform's motion was made on the basis of which the torques of pneumatic engines were determined and the times of falling and lifting.

W artykule opisana została definicja oraz wymienione zostały rodzaje progu zwalniającego jak również jego idea a także cel zastosowania. Pozytywne jak i negatywne skutki stosowania progów zwalniających. Poruszony został problem drgań i hałasu, które są przyczyną stosowania progów oraz inne niż progi metody i rozwiązania alternatywne ograniczenia ruchu drogowego.

Purpose: Due to the constantly progressing development of road infrastructure, which is very important in Poland, it is necessary to look at the possibilities of improving the quality of assembly of individual elements of the road structure. The main problem that negatively affects individual structures is the problem of vibrations transmitted from means of transport to the road. By performing specialized tests before assembly, we are able to assess the amount of vibrations in a specific area of the road. The paper presents the methods that were used in this type of research and the possibilities of using the above-mentioned methods. onroad assembly tests. Design/methodology/approach: The authors conducted a series of tests using modern sensors allowing for precise indications of vibrations in the studied area. Then, taking into account the tests of vibro-isolating materials, they had the opportunity to properly select them for individual road construction elements. Findings: As a result of the research, it is possible to minimize damage from means of transport to individual road construction elements and the roads themselves. Practical implications:The proposed solutions are different from those available on the market, and make it possible to control damage to roads, and even prevent them to a fairly large extent, which has an impact on extending the quality of repairs. According to the authors, performing tests in individual areas is necessary before installing road structural elements, as it extends their service life. Originality value: The use of original solutions not available on the market. They allow you to fully assess the correctness of the work performed and prevent future damage caused by vibrations.

The article discusses road infrastructure and its evolution to this day, as well as plans for further expansion of the public road network and the national road network until 2020/2030.