Tourism is directly related to passenger transport. For the improvement of quality of transport, thus-tourist services and quality of human life, the road vehicles are constantly developing. The moving speeds are rising and therefore-the accelerations acting on the passengers rise too. As a result-the comfort level drops. During cornering with high speeds lateral accelerations, which are a powerful irritant, causing discomfort, nausea and motion sickness called kinetosis, are generated. Systems for passenger cars tilting, which reduce lateral acceleration, are being used for a long time in railway transport. In automobiles such systems are harder to engineer and that is why they are still in experimental phase. A cheaper option is just tilting the seats in the automobiles. As children are the most vulnerable group of such kind of interference, the authors propose a special construction of a tilting child seat. The seat is designed, built and tested in real road conditions. Results from road and proving ground tests, showing a significant reduction of the lateral acceleration when using a tilting child seat, are shown in the paper.

To reduce the harmful vibrations to which passengers and drivers are exposed when traveling in road vehicles, various suspension systems for the vehicle, chassis or seats may be used. Most research and development is focused on reducing vertical vibrations. When the vehicle is cornering, lateral acceleration occurs, which causes discomfort to passengers. According to a number of studies, the value of lateral acceleration can be reduced if the vehicle or seats lean towards the center of the turn. This study looks at some solutions to increase comfort in road vehicles based on improving the design of the seats. New design solutions for a child tilting seat, which were developed by the authors, are presented. Road experiments have been carried out to demonstrate that the use of these seats when the vehicle is cornering can reduce the value of lateral acceleration.

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In this paper a multibody dynamic model of a wheeled tractor-front-end loader system with pneumatic boom suspension is created. A front-end loader was designed and manufactured to validate the dynamic model and to conduct proving ground tests. Comparisons of some simulation results with the measured data revealed that the proposed dynamics model can well describe the vibrations of the tested compact wheel loader. In addition, the results of tests for RMS acceleration and spectral densities at different speeds are presented.