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The impact of the Covid -19 pandemic on the frequency of vehicle accidents in Poland

100%

Frej D. P. , Zuska A.

Archiwum Motoryzacji

2023

tom Vol. 99, nr 1

30--44

This article analyzes the impact of the Covid-19 pandemic on the intensity of road accidents in Poland. The pandemic affected not only the health of citizens, but also their preferences in terms of communication. It significantly inhibited the mobility of the society and increased the capacity of urban traffic during the rush hour of some cities. The article contains statistics on the number of road accidents that occurred in 2011-2021 and the number of people who died as a result of these accidents. The period from 2019 to 2021 was subjected to a detailed analysis in this respect. It was observed that during this period there was a significant decrease in the number of road accidents as well as a significant 30% decrease in people fatalities on the road. Such a large decline has not been recorded so far since Poland joined the European Union. The article presents a forecast of the number of people fatalities in road accidents in Poland in the years 2022-2030 (taking into account the pandemic period), which predicts an annual decline in the number of road fatalities by 7%. This article emphasizes that the duration of the Covid-19 virus pandemic should be treated as a transitional period. The decreasing number of road accidents as well as the number of fatalities in road accidents over the next years may change and their annual downward trend may not be maintained.

Test bench for the assessment of vibrations occurring in motorcycles

80%

Podosek K. , Šarić Ž. , Zuska A.

Archiwum Motoryzacji

2022

tom Vol. 95, nr 1

65--78

The purpose of this publication is to present the construction and adaptation of the test stand intended for motorcycle simulation research. The stand is designed to study the impact of motorcycle vibrations that act on the body of the driver and passenger. Motorcycles belong to one of the types of transport that directly affects users. Excessive vibrations transmitted to the body of the driver and passenger can make driving uncomfortable and even dangerous. The vibrations of motorcycles depend mainly on the technical condition of the vehicle, the structure of the vehicle, and the construction of the engine. The stand was built on the basis of a hydraulic power supply unit, distributor, and electrohydraulic pulsators. The purpose of the construction of the stand is to examine a given group of motorcycles to learn and eliminate vibrations that occur in various areas of motorcycles and affect the comfort, health, and safety of motorcycle travelers. Test studies of the presented stand are presented in this article. The preliminary results of the simulation tests determined the possibility of testing individual elements and motorcycles on the laboratory stand.

Analysis of vertical vibrations affecting a child transported in a child seat during a car passing over the release speed bump

80%

Frej D. P. , Zuska A. , Cadge K.

Archiwum Motoryzacji

2019

tom Vol. 86, nr 4

111--125

The article presents the results of research on the assessment of vibrational comfort of children carried in child seats. The work analyzes the impact of the child's mass and the speed of the car passing through the speed bump on the level of vibration to which the passenger (child) transported in the child seat mounted on the rear seat of the car is exposed. The tested car seats were installed in a passenger car using the ISOfix base. During the tests, the measured values were the acceleration of the seat child seat, the backrest of the child seat, the rear seat of the car and the child seat ISOfix base. As part of the research, car drive through the speed bump were carried out at different car speeds and with different mass simulating the mass of a child. The test results were analyzed in order to determine the magnitude of vibrations generated during car drive through the speed bump. Based on the results obtained, the level of vibrational comfort of a child trip in a child seat was assessed.