The article focuses on evaluating a transportation experiment that intends to improve road safety by analyzing transport shocks that significantly affect the system of securing the load, vehicle, driver, and other aspects. Within Europe, improper or insufficient securing of loads causes up to 25% of all cargo vehicle accidents. Our transport experiment consists of eight rides of a Tatra truck. The measured values of shocks (acceleration coefficients) are statistically evaluated. Three hypotheses are established for these purposes. First, it is proven that the probability distributions of the shocks values differ statistically significantly among individual rides, namely in their shape and median value. Thus further statistical analyses are performed separately for the individual rides, axes, and the accelerometer locations. These analyses prove significant exceedances of the normatively set limits given by the EN 12195-1:2010 standard, which is potentially risky. Especially for the z axis and y axis, the set 20% limit was exceeded in 75.0% and 56.3% of cases, respectively. In the case of the x axis, the established 20% limit was practically not exceeded at all. The analysis of exceeding the permitted limits (the statistical evaluation of the second and third established hypothesis) is based on boxplots that graphically describe the individual rides, as well as on the found contaminated log-normal distribution of the values of the acceleration coefficients in the individual rides. The last hypothesis regarding exceeding the double value of the permitted limit is rejected. Methods of statistical comparison are used during data analysis. The probability distribution of acceleration coefficients is modeled using a contaminated log-normal distribution.

The article is concerned with the evaluation of a transport experiment conducted in the Czech Republic in order to prove the inappropriateness of the input data used for the purpose of cargo securing in vehicles. For the experiment, a TATRA truck was used. In a statistical evaluation, an overview of basic statistical characteristics, including an interpretation of significant values, is provided. In the article, a model of loading is presented illustrating the problem associated with the application of average – normative – values of acceleration coefficients when calculating inertial forces acting during transport on different types of roads.

Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, the scientific journal of the Mendel University in Brno, Czech Republic

The article is concerned with the vulnerability and resilience of the railway infrastructure in an urban agglomeration in the context of transport of specific (military) materials in crisis or emergency situations. The subject of the presented case study is the modelling and analysis of two crisis scenarios for a specific element of the critical transport infrastructure in an urban agglomeration - specifically the Usti nad Labem railway junction. The assumed construction of a high-speed line across the Ore Mountains (Krusne hory) is also included in the model. In the case study, the capacity and technical limits of the railway junction are discussed, incl. related risks arising from the surrounding urban environment. The results of the case study show a high vulnerability of the railway junction under consideration with relatively great impacts on the urban agglomeration and the entire region as a whole (at least in terms of the availability of railway transportation). In the context of the heavy dependence of the Army of the Czech Republic and part of the emergency supply system on the rail transportation, these capacities, especially in crisis situations, are of crucial importance. The article identifies bottlenecks, synthesizes findings and presents design measures to increase the resilience of the particular railway junction in the context of the urban agglomeration, or of the respective region.