Robert Zůvala
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View article: How did Covid-19 restrictions impact traffic safety on Czech rural roads?
How did Covid-19 restrictions impact traffic safety on Czech rural roads? Open
The spread of the Covid-19 pandemic brought a series of restrictions, leading to changes in mobility and traffic safety. The present study investigated the impact of restrictions stringency index on flow, speed, and safety in a sample of C…
View article: What should I use to calculate vehicle EES?
What should I use to calculate vehicle EES? Open
Comprehensive crash analysis includes calculating impact speed, which requires the determination of kinetic energy expended on the deformation of the vehicle’s structural elements at the point of contact during a collision. The accuracy of…
View article: How Should I Measure Vehicle Deformation Depth?
How Should I Measure Vehicle Deformation Depth? Open
Determination of deformation energy is an integral part of the accident analysis. Deformation energy could be expressed by parameter EES, which could directly enter the calculation or serve as a control parameter. To determine the EES para…
View article: Analysis of Covid restrictions influence on road traffic crashes and related road users behaviour in the Czech Republic
Analysis of Covid restrictions influence on road traffic crashes and related road users behaviour in the Czech Republic Open
The Covid pandemic and following restrictions worldwide influence various aspects -lockdown does not only have economic consequences but is also associated with a change in population mobility. As well as the spread of a pandemic and the a…
View article: What influences lateral position in horizontal curves?
What influences lateral position in horizontal curves? Open
Three road marking types — edgelines, a centreline, and no marking — are used on rural Czech roads, even though their impact on the lateral position of a vehicle in real-life driving behaviour is not completely understood. This study striv…
View article: Factors related to severe single-vehicle tree crashes: In-depth crash study
Factors related to severe single-vehicle tree crashes: In-depth crash study Open
Vehicle-tree collisions are the most common type of road crash with fixed obstacle in Czech Republic. Based on the literature review and using real world in-depth crash data, this paper aims to define factors, which significantly influence…
View article: Analysis of safety impact of paved shoulder width on Czech secondary roads
Analysis of safety impact of paved shoulder width on Czech secondary roads Open
Traffic safety is influenced, among other factors, by characteristics of the roads, which include the width of the shoulder. Shoulder width was noted to have a large effect on crash frequency, as well as on traffic speed. In this paper, we…
View article: Representativeness of Czech In-Depth Accident Data
Representativeness of Czech In-Depth Accident Data Open
Road accident occurrence is often the result of driving system malfunctions, and road safety improvements need to focus on all basic driving components—the vehicle, road infrastructure, and road users. Only focusing on one type of improvem…
View article: How does road marking in horizontal curves influence driving behaviour?
How does road marking in horizontal curves influence driving behaviour? Open
Purpose Given the inconsistent application of various road markings on Czech rural roads, there is a question “How does road marking in horizontal curves influence driving behaviour?” The study objective was to assess how centreline and ed…
View article: The Comparison of 3D and 2D Measurement Techniques Used for the Analysis of Vehicle Deformation
The Comparison of 3D and 2D Measurement Techniques Used for the Analysis of Vehicle Deformation Open
As one of the main assumptions for the accident analysis has been detailed information about vehicle deformation. The precise deformation depth allows to quantify deformation energy and related impact speed. The aim of this paper has been …
View article: Human factors contributing to the road traffic accident occurrence
Human factors contributing to the road traffic accident occurrence Open
Analysis of accident causation does not allow to clearly determine the influence of one specific cause. Traffic accident has been a result of many interacting factors. Most of accident causes classification systems have been focused on the…
View article: Analysis of selected off-road glances during driving in real road traffic
Analysis of selected off-road glances during driving in real road traffic Open
The aim of this ongoing research has been the analysis of driver visual behavior in real road traffic. The paper deals with analysis of duration of selected off-road glances. The total gaze duration depending on mirror type has been analys…
View article: THE SPEED BEHAVIOR OF CZECH PROFESSIONAL DRIVERS ACCORDING TO ORDINARY VS. VARIABLE SPEED LIMIT SIGNS: AN ON-ROAD AND DRIVING SIMULATION-BASED COMPARISON
THE SPEED BEHAVIOR OF CZECH PROFESSIONAL DRIVERS ACCORDING TO ORDINARY VS. VARIABLE SPEED LIMIT SIGNS: AN ON-ROAD AND DRIVING SIMULATION-BASED COMPARISON Open
\nUsing the speed of professional truck drivers, the effectiveness of speed limit signs was compared for 1) a temporary variable-message sign that uses LED technology and displays the current speed limit (hereinafter “VSL sign”) and 2) a n…
View article: Factors contributing on mobile phone use while driving: In-depth accident analysis
Factors contributing on mobile phone use while driving: In-depth accident analysis Open
The consequences of using and manipulating with a mobile phone while driving has a large negative effect on attention. Driver inattention is the major problem in road safety and generally belongs to the main causes of traffic accidents wit…
View article: Drowsy driving, vulnerable times of the day and traffic accidents
Drowsy driving, vulnerable times of the day and traffic accidents Open
It is estimated that sleep-related traffic accidents represent 20 % of all crashes and 25 % of all those with fatal consequences (Engleman & Douglas, 2005; Jackson et al., 2011). There are several risk factors increasing the likelihood of …
View article: Mathematical aspects of the kriging applied on landslide in Halenkovice (Czech Republic)
Mathematical aspects of the kriging applied on landslide in Halenkovice (Czech Republic) Open
Kriging is one of the geostatistical techniques for spatial data analysis that is usually used for a modelling of natural phenomena or a creation of digital elevation models. In this paper, we introduce kriging methods in the context of a …