Publikační činnost Katedry dopravního stavitelství / Publications of Department of Transport Constructions (227)

Permanent URI for this collectionhttp://hdl.handle.net/10084/100656

Kolekce obsahuje bibliografické záznamy publikační činnosti (článků) akademických pracovníků Katedry dopravního stavitelství (227) v časopisech registrovaných ve Web of Science od roku 2003 po současnost.
Do kolekce jsou zařazeny:
a) publikace, u nichž je v originálních dokumentech jako působiště autora (adresa) uvedena Vysoká škola báňská-Technická univerzita Ostrava (VŠB-TUO),
b) publikace, u nichž v originálních dokumentech není v adrese VŠB-TUO uvedena, ale autoři prokazatelně v době jejich zpracování a uveřejnění působili na VŠB-TUO.

Bibliografické záznamy byly původně vytvořeny v kolekci Publikační činnost akademických pracovníků VŠB-TUO, která sleduje publikování akademických pracovníků od roku 1990.

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Now showing 1 - 12 out of 12 results

Effect of winter road maintenance on the asphalt road surface - Experience in Slovakia and the Czech Republic
(MDPI, 2022) Cápayová, Silvia; Cihlářová, Denisa; Mondschein, Petr
The properties of asphalt mixtures and the quality of their execution are key factors for their service life and durability in the pavement structure. This research aims to study the effect of deicing chemicals (sodium chloride, NaCl) on asphalt mixtures in laboratory conditions to know the changes in properties when the samples were loaded with a different number of freeze-thaw cycles. The behavior of the standardly used asphalt mixtures and bitumen binders was verified by the exposure to sodium chloride solution (20 g/L NaCl). In the first part of the experiment, penetration, elastic recovery, and softening point tests were performed for paving grade bitumen 50/70 and 70/100, and polymer-modified bitumen PMB 25/55-60. Furthermore, asphalt concrete (AC 11) mixtures with different air voids were subjected to 25, 50, and 75 freeze-thaw cycles to determine the effect on the service life of the pavement structure. Following the Czech standard, CSN 73 6161, and the TP 170 regulation for the design of asphalt pavements, the Marshall test and the stiffness modulus were determined for all asphalt samples. The obtained results show a negative effect of freeze-thaw cycles on the properties of asphalt concrete surface course mixtures and bitumen.
The transport of oversized cargoes from the perspective of sustainable transport infrastructure in cities
(MDPI, 2021) Petrů, Jan; Křivda, Vladislav
The article deals with the transport of oversized cargoes from the perspective of parameters of road network in city environments. In recent years, there has been an increase in the transport of products with dimensions and weight considered above standard. It is very difficult to transport these products not only within Europe but also worldwide. This is also pointed out in the European directive, which recommends that all EU member states build a pan-European network of corridors for the transport of oversized cargoes. The article analyses the issue of transport within the transport infrastructure in cities from the perspective of sustainability of road networks for ensuring the passage of oversized cargoes. The article describes the results of research that was performed for the determination of parameters to ensure the passage of oversized cargoes on roads. The article also deals with the analysis of implemented transports, the results of video analysis of monitored transports, measurement of swept paths of vehicles using GPS apparatus and drones, modelling of oversized vehicles in programs for verification of the swept paths of vehicles, simulation of passage of oversized cargo, the determination of values of radii of corners, widths and heights for the transport of cargoes and the distance from solid obstacles. The precondition for the above-mentioned outputs is the practical use of results in planning the transport infrastructure on the entire communication network and the possibility of its application for designing activities associated with the construction or reconstruction of intersections on routes of frequent transport of excessive and oversized cargoes and verification of critical points on the route. The outputs of the work serve as a basis for the processing of technical conditions, which include procedures and technical recommendations within the design practice in the Czech Republic but also abroad. Emphasis is placed on sustainable, safe and economic transport infrastructure.
Use of microsimulation traffic models as means for ensuring public transport sustainability and accessibility
(MDPI, 2021) Křivda, Vladislav; Petrů, Jan; Mácha, David; Novák, Jakub
This article deals with the issue of a partial problem in the sustainability and availability of public transport using the example of a specific transit node. In every public transport network, it is the transit nodes that can be a threat to the entire transport system in case of a bad design. The article presents a microsimulation traffic model of a transit node, which was created in the PTV VISSIM/VISWALK program. This model was tested by various traffic loads (i.e., normal loads, loads taking into account the extension of the tram network and loads at extraordinary sports or cultural events). As part of the evaluation of the monitored node, the movement of passengers on pedestrian areas, escalators and staircases was analysed. The obtained results demonstrate the importance of monitoring, for example, the Level of Service, average travel times and pedestrian speeds and other parameters, to ensure the functionality of this construction. The use of traffic models can be crucial, as they can be an invaluable aid and a suitable tool in finding the optimal transport solution that respects the requirements for sustainable and accessible public transport.
An analysis of turbo roundabouts from the perspective of sustainability of road transportation
(MDPI, 2021) Petrů, Jan; Křivda, Vladislav
The designs of turbo roundabouts vary among countries and undesirable and potentially dangerous situations can occur for vehicles passing through the roundabout. In this article, we focus on an analysis of one of the problems within sustainable road transportation, i.e., the geometric layout of turbo roundabouts. First, we review the Czech and foreign regulations and describe the design procedures for turbo roundabouts. Studies that have been performed in the Czech Republic and abroad (the Netherlands, Slovenia, Poland, Germany, Hungary, etc.) are described. We evaluate the geometric layout of turbo roundabouts, the effectiveness of construction adjustments at the entrance to the roundabout, and an analysis of the physical separation of lanes. We present procedures and methods for measurements and assessments, which are used for evaluating the effectiveness of the geometry of a turbo roundabout. Finally, conclusions for the given hypotheses are given, as well as the importance of geometric elements (shape of the turbo roundabout, physical separation of lanes, the spike, etc.) for the actual passage of vehicles through the turbo roundabout. Furthermore, we discuss how these elements influence the safety of road traffic, the sustainability of road transportation, and the emergence of potentially dangerous situations.
An analysis of traffic conflicts as a tool for sustainable road transport
(MDPI, 2020) Křivda, Vladislav; Petrů, Jan; Mácha, David; Plocová, Kristýna; Fibich, David
This paper presents an approach to partially solving an issue within the scope of sustainable road transport, specifically the issue of potential accidents, i.e., traffic conflicts. First, a method is introduced for the analysis of traffic conflicts using video equipment. The attention is focused on traffic conflicts that occur at turbo-roundabouts. Given the diversity of causes of traffic conflicts, the emphasis is placed on the correct identification of the cause, i.e., whether the conflict is caused only by the negligence of the road user, or whether the conflict is more or less influenced by an inappropriately designed turbo-roundabout or one or more of its specific building elements (e.g., unsuitable corner radius). The next part of the article presents a selection of results that were obtained from analyses performed at about 100 turbo-roundabouts in nine European countries. Illustrative diagrams show the courses of the emergence of traffic conflicts, the causes of which are then described in detail. The conclusions from these analyses confirm the main hypothesis that the evaluation of traffic conflicts should be an essential part of designing roads, in order to increase traffic safety and, importantly, contribute to sustainable transport.
Reliability of the transport system in an area affected by the mining underground activity
(Polskie Towarzystwo Przeróbki Kopalin, 2020) Hudeček, Leopold; Řezáč, Miloslav; Cihlářová, Denisa; Roháč, Otto
The paper deals with the negative effects of mining on the transport network in the Moravian-Silesian area, especially is focused on problems reflected in construction layers of transport-related structures (railways, roads, area storage and handling areas). With the extraction downturn, the sources and objectives of transport have changed including the characteristics of transport flows of all traffic roads and connections. Various measures for all transport modes situated in Moravian-Silesian region are identified and introduced in the both districts. Also new relevant directions of transport development are described considering efficiency, effectiveness. And also these measures are taken for to needs minimization negative impact on the health and quality of our environment while ensuring the transport services in the region. The dynamic development of the Ostrava agglomeration is thus inseparably connected with black coal mining, metallurgy and railway development. The position of extraction companies was set by the position of the deposit, which resulted in the establishment of a polycentric system of settlement in the agglomeration. Further development of the coal railways at the end of the 19th century was related to the extraction capacities in the region of Karvind. The greatest industrial and development boom was experienced at the beginning of the 20th century where there were massive changes in the condition of the entire Ostrava basin. After 1989, with reduction in the mining work, primary "brownfields" started appearing in OKD, being industrial premises of the mines as well as secondary "brownfields", which were disused railway siding stations and connecting railway sidings. High-performance, sufficiently efficient and comfort system of transport infrastructure appears to be a key factor for future development this area. The development of mining in the past years was subject to a functional transport system, with prevailing requirements for the transportation of large volumes of extracted material, structural elements and people working in this industry. With the extraction downturn, the sources and objectives of transport have changed including the characteristics of transport flows of all traffic roads and connections. Thus, in this area it is necessary to identify the consequences of mining, reclaim the landscape, reconstruct civil structures and ensure safe and reliable transport through transport-engineering measures which may ensure the required transport standard and minimise its adverse environmental impacts.
The process of setting the parameters for ensuring passage of oversized cargos
(RTU Press, 2019) Petrů, Jan; Křivda, Vladislav
Engineering and the industry very often produce above-standard products concerning their dimensions and weights. There is often a problem with the transport of these products both within Europe and in subsequent transport all around the world. Because of these reasons, several projects to remedy the situation were implemented in the Czech Republic. The article describes the results of many years of research, which observed ensuring the passage of oversized cargos on roads. Further, the measurements, which were carried out, are presented in this paper - the measurement of an oversized vehicle using Global Positioning System devices, creation and modelling of missing cars in programs to verify the swept path, comparison of created models with the measurement using Global Positioning System devices. Then the results of the implemented researches, the suggested parameters, and modelled cars are used for the suggestion of technical parameters of backbone network of roads. On these roads, the loads are transported. The results are also used for verification of critical points of the route, e.g. problematic places and intersections.
Experience with the use of warm mix asphalt additives in bitumen binders
(De Gruyter, 2018) Cápayová, Silvia; Unčík, Stanislav; Cihlářová, Denisa
In most European countries, Hot Mix Asphalt (HMA) technology is still being used as the standard for the production and processing of bituminous mixtures. However, from the perspective of environmental acceptability, global warming and greenhouse gas production, Slovakia is making an effort to put into practice modern technology, which is characterized by lower energy consumption and reducing negative impacts on the environment. Warm mix asphalt technologies (WMA), which have been verified at the Department of Transportation Engineering laboratory, Faculty of Civil Engineering, Slovak University of Technology (FCE, SUT) can provide the required mixture properties and can be used not only for the construction of new roads, but also for their renovation and reconstruction. The paper was created in cooperation with the Technical University of Ostrava, Czech Republic, which also deals with the addition of additives to asphalt mixtures and binders. It describes a comparison of the impact of some organic and chemical additives on the properties of commonly used bitumen binders in accordance with valid standards and technical regulations.
Use of adhesion promoters in asphalt mixtures
(De Gruyter, 2018) Cihlářová, Denisa; Fencl, Ivan; Cápayová, Silvia; Pospíšil, Petr
The purpose of asphalt binder as a significant binder in road constructions is to permanently bind aggregates of different compositions and grain sizes. The asphalt binder itself does not have suitable adhesiveness, so after a period of time, bare grains can appear. This results in a gradual separation of the grains from an asphalt layer and the presence of potholes in a pavement. Adhesion promoters or adhesive agents are important and proven promoters in practice. They are substances mainly based on the fatty acids of polyamides which should increase the reliability of the asphalt's binder adhesion to the aggregates, thus increasing the lifetime period of the asphalt mixture as well as its resistance to mechanical strain. The amount of a promoter or agent added to the asphalt mixture is negligible and constitutes about 0.3% of the asphalt's binder weight. Nevertheless, even this quantity significantly increases the adhesive qualities of an asphalt binder. The article was created in cooperatation with the Slovak University of Technology, in Bratislava, Slovakia, and focuses on proving the new AD2 adhesive additive and comparing it with the Addibit and Wetfix BE promoters used on aggregates from the Skutec - Liticka and Bystrec quarries.
Height and width parameters for ensuring passage of excessive loads on roads
(České vysoké učení technické v Praze, 2017) Petrů, Jan; Křivda, Vladislav
The article deals with the issues of a passage of excessive transport on the roads and with ensuring necessary height and width conditions for such transport in the Czech Republic. Currently, the regulations for designing roads for passage of excessive and oversize cargos are missing in the Czech Republic. Based on these aspects, the research in this area was done and the parameters for ensuring passage of excessive loads on the roads were determined. The article describes the issue of the transport within the Czech Republic, it also describes the created database of transport and its subsequent statistical analysis. Furthermore, it describes the process of determination of the resulting parameters, which should serve as a basis for the legislation and for creation of technical conditions.
Assessment of the capacity of roads weaving segments
(De Gruyter, 2017) Mahdalová, Ivana; Petrů, Jan; Křivda, Vladislav
Driving style is affected by development of cars and it has influence on the capacity of designed elements of roads and highways. Therefore, based on research, more accurate methods for assessing the capacity of road infrastructure are being developed. This paper presents the results of the research of weaving segments. It is focused on capacity assessment of these sections within the Czech Republic. Attention is focused especially on weaving segments in urban conditions with high traffic volume and on road sections with a speed limit less than 80 km per hour. Research verified the possibility of using these purposes by existing methodology developed for roads with a speed limit up to 80 km per hour.
Analysis of conflict situations in road traffic on roundabouts
(University of Zagreb, Faculty of Transport and Traffic Sciences, 2013) Křivda, Vladislav
The wrong behaviour of road traffic participants is a permanently discussed issue in many countries with advanced road transport. Such behaviour does not always result in traffic accident, but only in restriction or danger to the culprit or other participants. For monitoring the behavioural problems it is possible to apply the video-analysis of the conflict situations. The methodology of the conflict situations monitoring with the video-apparatus application is described in the paper presented. There are also results of the conflict situations analysis on the selected roundabouts in the Czech Republic. The paper refers to the suitability of the conflict situations video-analysis application not only for monitoring the wrong behaviour of drivers and other road traffic participants, but also for monitoring the inappropriately designed building elements (this hypothesis has been confirmed by the results of research, which are shown in this paper).

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