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Optimizing of road design elements by means of vehicles’ swept paths
Čepil, Jiří ; Katarína, Bačová (referee) ; Josef, Kocourek (referee) ; Radimský, Michal (advisor)
The dissertation deals with application of simulated swept paths of vehicles to road designs. Using software which generates simulated swept paths makes new demands on the designer, but Czech regulations do not stipulate the appropriate method of applying swept paths. The theoretical part of the dissertation analyses the theory of how a vehicle moves when passing through a horizontal road curve and a method of calculating a necessary extent of widening the road. The practical part compares swept paths generated by various software programs and differences between them. In order to verify the shapes and dimensions of the swept paths generated, the swept path of a real vehicle was measured. This swept path was then compared with the one generated, and the differences between them were evaluated. One of the software programs was chosen as a reference program, and its output was applied to a road design pursuant to valid regulations. The results obtained within the dissertation were used to develop certified methodology titled: „Methodology of widening road lanes in horizontal curves and of application of vehicles’ swept paths “.
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Design elements turbo-roundabouts
Smělý, Martin ; Bačová,, Katarína (referee) ; Kocourek,, Josef (referee) ; Radimský, Michal (advisor)
Dissertation describes new methodology of design turbo-roundabouts in Czech Republic. Especially innovative is approach to the design of traffic lanes with regards to standard vehicles and widening of traffic lanes according to their dimensions. Innovative is also approach to road signs, where details of current signs are modified, however, these details are important for drivers’ better understanding while driving through turbo-roundabouts. Dissertation fills legislative, but also technical, blank spot during turbo-roundabouts design and I believe that it will benefit particularly designers of these intersections.
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Rules designing roads for skaters
Skalická, Petra ; Bačová,, Katarína (referee) ; Kocourek,, Josef (referee) ; Radimský, Michal (advisor)
The dissertation deals with non-motorized transport. Specifically, it focuses directly on the new non-motorized traffic sector, which is the riders of roller skates. Title of the dissertation The rules for designing roads for skaters were selected from the point of view of unresolved issues. The main goal of the dissertation is to enable the legislative inclusion of skaters as a separate group into the transport hierarchy so that they can gain space for their movement in the transport area. The result should be primarily a reduction in accidents and an increase in road safety for non-motorized vehicles. Other objectives of the thesis include the creation of design parameter tables for methodological instructions based on the analysis of the data obtained by measuring and determining the critical traffic intensity on existing roads. The dissertation summarizes the current issue of non-motorized transport, but especially the issue of skaters transport. It assesses the situation in the Czech Republic compared to the conditions abroad. It explains the physical patterns of the skater's movements, based on which the spatial demands on the used transport space are derived. The following is an overview of selected methods dealing with measurement and evaluation of transport speeds and intensities. Depending on the values found, rules are then created for designing the basic parameters of the skateboard trail network, which includes, for example, traffic sign design and construction requirements.
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Objectification of Calculation of Passing Sight Distance Parameters
Valentová, Veronika ; Kocourek,, Josef (referee) ; Mahdalová,, Ivana (referee) ; Radimský, Michal (advisor)
Overtaking maneuver is very complex event influenced by many parameters. The most important parameters are vehicle performance, longitudinal slope, the speed at the beginning of the maneuver, the reaction time of the driver. Overtaking distance at CSN 73 6101 is determined on the basis of a simplified physical model. It considers constant speed of vehicles (overtaking and overtaken) and it does not consider a longitudinal gradient of road. This calculation is used for several decades and it is required to verify this procedure. That was the purpose of this work. Detailed physical model was performed for several types of passenger vehicles, performance curves and gear changes were included too. Distances between vehicles at the beginning and in the end of the maneuver were chosen with regard to reaction times of drivers. Distances were compared with conclusions of observation studies. Input values of some parameters were determined by own measurement and compared with data reported in the literature. The analysis was performed using the video camera positioned at the front and rear of the vehicle. For selected vehicle were conducted simulations testing the influence of particular parameters. The parameters with the biggest influence were longitudal slope of the road and rolling friction. To achieve results useful for a possible regulations update for the design of roads another simulation models for 43 variants of passenger cars with different engines and transmissions were done. The vehicles were divided into categories based on engine capacity and engine power (up to 1400 ccm, over 1400 ccm; 66 kW to over 66 kW). Results were compiled in tabular form that could be used to discuss modifications to CSN 73 6101 Design of roads.
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Optimizing of road design elements by means of vehicles’ swept paths
Čepil, Jiří ; Katarína, Bačová (referee) ; Josef, Kocourek (referee) ; Radimský, Michal (advisor)
The dissertation deals with application of simulated swept paths of vehicles to road designs. Using software which generates simulated swept paths makes new demands on the designer, but Czech regulations do not stipulate the appropriate method of applying swept paths. The theoretical part of the dissertation analyses the theory of how a vehicle moves when passing through a horizontal road curve and a method of calculating a necessary extent of widening the road. The practical part compares swept paths generated by various software programs and differences between them. In order to verify the shapes and dimensions of the swept paths generated, the swept path of a real vehicle was measured. This swept path was then compared with the one generated, and the differences between them were evaluated. One of the software programs was chosen as a reference program, and its output was applied to a road design pursuant to valid regulations. The results obtained within the dissertation were used to develop certified methodology titled: „Methodology of widening road lanes in horizontal curves and of application of vehicles’ swept paths “.
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Rules designing roads for skaters
Skalická, Petra ; Bačová,, Katarína (referee) ; Kocourek,, Josef (referee) ; Radimský, Michal (advisor)
The dissertation deals with non-motorized transport. Specifically, it focuses directly on the new non-motorized traffic sector, which is the riders of roller skates. Title of the dissertation The rules for designing roads for skaters were selected from the point of view of unresolved issues. The main goal of the dissertation is to enable the legislative inclusion of skaters as a separate group into the transport hierarchy so that they can gain space for their movement in the transport area. The result should be primarily a reduction in accidents and an increase in road safety for non-motorized vehicles. Other objectives of the thesis include the creation of design parameter tables for methodological instructions based on the analysis of the data obtained by measuring and determining the critical traffic intensity on existing roads. The dissertation summarizes the current issue of non-motorized transport, but especially the issue of skaters transport. It assesses the situation in the Czech Republic compared to the conditions abroad. It explains the physical patterns of the skater's movements, based on which the spatial demands on the used transport space are derived. The following is an overview of selected methods dealing with measurement and evaluation of transport speeds and intensities. Depending on the values found, rules are then created for designing the basic parameters of the skateboard trail network, which includes, for example, traffic sign design and construction requirements.
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Objectification of Calculation of Passing Sight Distance Parameters
Valentová, Veronika ; Kocourek,, Josef (referee) ; Mahdalová,, Ivana (referee) ; Radimský, Michal (advisor)
Overtaking maneuver is very complex event influenced by many parameters. The most important parameters are vehicle performance, longitudinal slope, the speed at the beginning of the maneuver, the reaction time of the driver. Overtaking distance at CSN 73 6101 is determined on the basis of a simplified physical model. It considers constant speed of vehicles (overtaking and overtaken) and it does not consider a longitudinal gradient of road. This calculation is used for several decades and it is required to verify this procedure. That was the purpose of this work. Detailed physical model was performed for several types of passenger vehicles, performance curves and gear changes were included too. Distances between vehicles at the beginning and in the end of the maneuver were chosen with regard to reaction times of drivers. Distances were compared with conclusions of observation studies. Input values of some parameters were determined by own measurement and compared with data reported in the literature. The analysis was performed using the video camera positioned at the front and rear of the vehicle. For selected vehicle were conducted simulations testing the influence of particular parameters. The parameters with the biggest influence were longitudal slope of the road and rolling friction. To achieve results useful for a possible regulations update for the design of roads another simulation models for 43 variants of passenger cars with different engines and transmissions were done. The vehicles were divided into categories based on engine capacity and engine power (up to 1400 ccm, over 1400 ccm; 66 kW to over 66 kW). Results were compiled in tabular form that could be used to discuss modifications to CSN 73 6101 Design of roads.
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Design elements turbo-roundabouts
Smělý, Martin ; Bačová,, Katarína (referee) ; Kocourek,, Josef (referee) ; Radimský, Michal (advisor)
Dissertation describes new methodology of design turbo-roundabouts in Czech Republic. Especially innovative is approach to the design of traffic lanes with regards to standard vehicles and widening of traffic lanes according to their dimensions. Innovative is also approach to road signs, where details of current signs are modified, however, these details are important for drivers’ better understanding while driving through turbo-roundabouts. Dissertation fills legislative, but also technical, blank spot during turbo-roundabouts design and I believe that it will benefit particularly designers of these intersections.
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The image of Prussia in the Czech medieval sources
KOCOUREK, Josef
The aim of this dissertation is an attempt to reconstruct an image of Prussia based on the Bohemian middle-age sources. The time horizon of the dissertation is between 10th and 15th century, the period ranging from the first contact between the two regions embodied by the first missionary journey of St. Adalbert to conflicts between Teutonic Orderand Polish-Lithuanian commonwealth, which took place in Prussia. The structure of the dissertations is relatively complex. The first chapter is focused on the general history of Prussia until the arrival of the Teutonic Order. The following chapter deals with the general history of the order. This chapter is divided into two parts: - The first subsection deals with the general history of the Teutonic Order from its inception until 1525 - The second subsection describes the history of law in Bohemia The following chapter titled?Prussian-Bohemian relations in the 10th to 15th century?contains a list of contacts, which took place between the kingdom of Bohemia and Prussia. Every important contact is set in the political context of the time. The image of Prussia from Bohemian prospective is analyzed in the main part of this disseartion using Czech medieval sources. This chapter is also divided into two parts: - The first subsection is devoted to image of the Prussian tribal population between10th to 14thcentury, - The second subsection then analyzes the image of the Teutonic Knights in Bohemia in the years 1204-1466. Both parts aim to interpret images, be it images of tribal people or of the Teutonic Knights, in the given period and to reflect on the possible developments during the specified period. The conclusion is devoted to the main questions of the dissertation as well as to their answers. First, how were tribal Prussians reflected in Bohemian sources? Did the image of tribal Prussians change over time? If so, how did their image change or develop based on the new findings? How were the Teutonic Knights reflected in the Bohemian medieval sources, since their arrival in the Bohemian kingdom until the end of the so-called ?thirteen-year war.? How and why did the image of orders develop and change during this period?
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