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Analýza bezpečnosti silničního provozu v systému "řidič - automobil - prostředí". / Analysis of road safety in the "driver - car - neighbourhood"KNEIFL, Petr January 2011 (has links)
This graduation theses evaluates the current state of road safety. The work contains the current legislation in the Czech Republic, i.e., regulations and laws. It presents basic concepts in automotive safety. Another part is the analysis and synthesis and the starting point lies in measures to prevent accidents as well as in risk measures in case of accidents. It is therefore to mitigate the damage and injuries due to accidents. In addition, it monitors driver training in driving schools. The final section deals with the proposal for resolving the current situation, in particular proposed measure is applicable in real practice when training drivers.
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Analýza kritických míst v silniční dopravě ve vybraném regionu - Břeclavsko / Analysis of Critical Locations for Road Transport in a Chosen Region – BřeclavskoTomíšková, Ivana January 2012 (has links)
This master thesis analyzes the specific bottlenecks on the terrestrial communications in the area Břeclav. The aim is to suggest organizational and engineering measures which lead to increase traffic safety in selected road sections of terrestrial communications.
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A risk management framework for a complex adaptive transport system / Un cadre de gestion du risque pour un système adaptatif complexe de transportNisula, Jari 01 March 2018 (has links)
La science a connu des avancées significatives en matière de gestion du risque au cours de la dernière décennie. Toutefois, les pratiques actuelles de gestion du risque dans le domaine industriel n'ont pas tiré tout le profit de ces développements. Le sujet de recherche de cette thèse peut être formulé ainsi : comment bâtir un cadre de gestion du risque afin de gérer les risques dans le transport, en adoptant les perspectives modernes du risque et les dernières connaissances de sécurité, tout en considérant le système de transport comme un système adaptatif complexe ? Ceci, à travers la perspective d'une agence nationale de la sécurité des transports, dont la responsabilité est la supervision de la sécurité de plusieurs modes de transport, incluant l'aérien, le maritime, le ferroviaire et le routier. La connaissance scientifique actuelle est passée en revue pour les sujets de risques et d'appréciation du risque, de sécurité et de gestion de la sécurité ainsi que les systèmes adaptatifs complexes. L'approche moderne du risque implique reconnaitre l'importance de l'incertitude et la solidité des connaissances dans l'analyse du risque ainsi que le rôle des imprévus. Le système de transport est identifié comme un système adaptatif complexe. De tels systèmes se caractérisent par un large volume d'interactions, de nombreuses boucles de rétroaction, des phénomènes non-linéaires, l'émergence, l'imprévisibilité et la contre-intuitivité. Sont étudiées les façons recommandées d'interagir avec les systèmes complexes afin de tenter de parvenir à un changement positif. Les concepts relatifs à la gestion de la sécurité sont également présentés et notamment le concept de résilience qui peut être interprété soit comme une élégante extensibilité des équipes ou des organisations, soit comme une adaptabilité continue. Les cadres existants de management du risque sont revus à la fois dans l'industrie et dans la littérature scientifique ainsi que la norme internationale ISO 31000. Basé sur l'état de l'art, un ensemble de critères pour un processus moderne de management du risque est développé. Le cadre proposé de gestion du risque dans le transport comprend des perspectives modernes du risque et considère le système de transport comme un système adaptatif complexe. Il permet de présenter les risques des différents modes de transport dans une visualisation globale de risque et de l'utiliser en tant que support pour prise de décision afin d'optimiser l'impact sur la sécurité avec les ressources qui sont toujours limitées. L'impact est encore renforcé par les moyens d'intervention tels que les stratégies adaptives et l'expérimentation, qui sont bien adaptés aux systèmes complexes. Elle est validée selon les critères élaborés et par comparaison avec les cadres existants. Le cadre proposé de gestion du risque ainsi que la thèse sont tous deux structurés d'après la norme ISO 31000. Enfin une étude de cas présente la mise en œuvre actuelle de cette nouvelle approche à l'Agence Nationale Finlandaise de la Sécurité des Transports. / Over the last ten-fifteen years, science has made significant advances in fields relevant for risk management. However, current risk management practices in industry have not yet benefitted from these developments. The research question addressed in this dissertation is: What kind of risk management framework should be used for managing transport risks when the modern risk perspectives and the latest understanding of safety are embraced, and the transport system is considered a complex adaptive system? The focus of this research is on transport risks, taking the perspective of a national transport safety agency, tasked with overseeing safety across several modes of transport, including aviation, maritime, railway and road safety. The scientific literature on risk and risk assessment, safety and safety management, as well as complex adaptive systems are reviewed. The research illustrates that a modern risk perspective recognizes the importance of uncertainty and strength of knowledge in risk analysis, as well as the role of surprises. The transport system is identified as a complex adaptive system, characterized by a high number of interactions, emergence, multiple feedback loops, nonlinear phenomena, unpredictability and counter-intuitiveness. The recommended ways to interact with such complex systems and to try to achieve positive change are explained. Concepts related to safety management are also investigated, especially the concept of resilience, which is interpreted as graceful extensibility of teams or organizations, or as sustained adaptability. Evidence of existing risk management frameworks in both the industry and scientific literature is outlined and reference is made to the international ISO 31000 standard for risk management. Based on the literature review, a set of criteria for a modern risk management process is developed. A risk management framework for managing transport risks which embraces modern risk perspectives and accounts for the transport system as a complex adaptive system is proposed. It enables risks in all transport modes to be presented in a single risk picture and supports decision-making to maximize the safety impact achievable with limited resources. The impact is further enhanced by intervention strategies such as adaptive policies and experimentation, which are well-suited to complex systems. The framework is validated against the criteria developed, and by comparison to existing methods. A case study presents the on-going implementation of the developed risk management framework at the Finnish Transport Safety Agency. Both the proposed risk management framework and the dissertation are structured according to the ISO 31000 framework.
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A cost effective grassland management strategy to reduce the number of bird strikes at the Brisbane airportThomson, Belinda January 2007 (has links)
In an era of acute concern about airline safety, bird strikes are still one of the major hazards to aviation worldwide. The severity of the problem is such that it is mandatory in all developed countries to include bird management as part of airport safety management programs. In Australia, there are approximately 500 bird aircraft strikes per year (Bailey 2000). Brisbane airport has a relatively high occurrence of strikes, with an average of 77 recorded every year (2002-2004). Given the severity of the problem, a variety of techniques have been employed by airports to reduce bird strikes. Scare devices, repellents, continuous patrols for bird hazing, use of raptors to clear airspace of birds and depredation are used by many airports. Even given the diversity of control methods available, it is accepted that habitat management is the most effective long term way to control birds in and around the airport space. Experimental studies have shown that habitat manipulation and active scaring measures (shooting, scaring etc), can reduce bird numbers to an acceptable level. The current study investigated bird populations in six major vegetation habitat types identified within the operational and surrounding areas of Brisbane airport. In order to determine areas where greater bird control and management should be focused, bird abundance, distribution, and activity were recorded and habitats that pose the greatest bird strike risk to aircraft were identified. Secondly, species with high hazard potential were identified and ranked according to their hazard potential to aircraft. This study also investigated the effectiveness of different vegetation management options to reduce bird species abundance within operational areas of Brisbane airport. Four different management options were compared. Each management option was assessed for grass structural complexity and potential food resources available to hazardous bird species. Analysis of recorded data showed that of the habitats compared within the Brisbane airport boundaries, grasslands surrounding runways, taxiways and aprons possess the greatest richness and abundance of bird species that pose the greatest potential hazard to aircraft. Ibis and the Australian kestrel were identified as the bird species that pose the greatest risk to aircraft at Brisbane airport, and both were found in greatest numbers within the managed grasslands surrounding operational areas at the airport. An improved reporting process that allows correct identification of all individual bird species involved in bird strikes will not only increase the accuracy of risk assessments, but will also allow implementation of more effective control strategies at Brisbane airport. Compared with current grassland management practice, a vegetation management option of maintaining grass height at 30-50cm reduced total bird utilisation by 89% while utilisation of grassland by potentially hazardous birds was also reduced by 85%. Maintaining grass height within the 30-50cm range also resulted in a 45% reduction in the number of manipulations required per year (11 to 6), when compared with current management practices, and a 64% reduction in annual maintenance cost per hectare. When extrapolated to the entire maintained grass area at Brisbane airport, this resulted in a saving of over $60 000 annually. Optimisation of potential hazard reduction will rely on future studies that investigate the effect of particular vegetation species that could replace the existing mix of grasses used at Brisbane airport and an understanding of the relative importance of vegetation structure and food supply in determining utilisation by potentially hazardous bird species.
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goG - die Neue Urbane MobilitätHöhne, Hans-Georg 09 September 2021 (has links)
Es wird ein umfassendes Verkehrskonzept für das urbane Umfeld beschrieben, welches durch den neuen kollaborativen Fahrzeugtyp mit dem Namen goG [go 'dschi] ermöglicht wird. Fahrzeuge dieses Typs können sich nahtlos im bestehenden Straßenverkehr eingliedern, ohne dass daran Anpassungen vorzunehmen sind. Auf Grund seiner kollaborativen Fähigkeiten können goGs aber auch zu Konvois des ÖPNVs formiert werden und annähernd 80% der im Vergleich für PKWs benötigten Parkplatzfläche einsparen. Des weiteren befähigen sie das goG in voller Fahrt von der Straße an eine über der Straße verlaufenden Umlaufseilbahn zu wechseln. Ein gittergleiches Netzwerk solcher Seilbahnen erlaubt das automatische Durchrouten von goGs 6 Meter über dem Straßenniveau, bei einer konstanten Geschwindigkeit von 50 km/h. An Seilbahnknotenpunkten werden durch Manipulatoren die goGs in voller Fahrt von einer Seilbahn in die vorgesehene nächste Seilbahn umgehängt. Durch hängebrückenartige Aufhängung der Umlaufseilbahnen oberhalb bestehender Straßenzüge werden keine zusätzlichen Flächen benötigt. Der Durchsatz einer Fahrbahn vergrößert sich durch die darüber geführte Umlaufseilbahn um mehr als das Doppelte. Ein autonomes Fahren bei maximal 6km/h zur nächsten goG-Linie des ÖPNV bzw. Seilbahn führt zu einer Vielzahl von Synergieeffekten.
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Advanced Simulation Methodologies For Crashworthiness And Occupant Safety Assessment Of An Indian Railways Passenger CoachPrabhune, Prajakta Vinayak 07 1900 (has links) (PDF)
Accidents involving passenger trains happen regularly in India. The reasons for such accidents could be many; such as weather and flooding, faulty tracks, bridge collapse, collisions caused by signaling errors, mechanical failures, driver error, sabotage etc. The annual accident-related deaths as a percentage of the total number of passengers carried by Indian Railway may seem to be negligible, but the aim should be to achieve zero fatality as every single person killed is an irreplaceable loss to his/her family. It needs to be mentioned that in addition to fatalities for which exact numbers are not available, serious injuries and permanent disabilities caused by train accidents in India at present stand completely unaccounted for. In the absence of a large scale renovation and crash avoidance measures coupled with the propensity to increase the number of trains every year, enhancing passive safety is crucial i.e. crashworthiness and occupant safety of passenger coaches of Indian trains. In the current work, crashworthiness and occupant safety of the existing typical three-tier cabin passenger coach of Indian Railway in an event of collision accident are assessed with the aid of a finite element analysis.
In the light of the published work on research in railroad equipment crashworthiness, the current work is intended to envisage the methodology to assess the Indian Railway passenger coach from the point of view of the crashworthiness and occupant safety using CAE (Computer aided engineering) based approach. It is involved with an extensive study of the structural crush behavior of an individual passenger coach car and its effect on the interaction between occupants and the coach interior. Here the structural crush behavior of a typical three-tier cabin passenger coach is evaluated for the head-on impact against a fixed and rigid barrier. The occupant response for the same scenario is also studied which can be viewed as a component of the actual occupant response due to the structural crush behavior of the passenger coach. This can give useful estimates of injury severity and fatalities that may occur in actual accidents.
An FE model of the passenger coach structure was built and validated using International Railway Union (UIC) specified code OR 567-design requirements in terms of static loads constituting structural proof cases. These proof cases specify the static load values the coach body structure should withstand without any permanent deformation or failure when applied at the specified locations on the structural ends across the longitudinal axis. In addition, a favorable correlation between the simulation and actual experiment for drop impact behavior of the open section specimens, namely C-section and I-section, was obtained to validate the simulation methodology. LS-DYNA a nonlinear dynamic explicit FE solver was used to carry out all the dynamic impact simulations involved in the current work. The material modeling takes into account the strain rate effect which is essential for the material impact behavior study. The contact modeling was done using penalty contact method. The degrading effect of the buffer on the structural crush patterns which induced the undesirable global bending and jackknifing of the whole coach structure was demonstrated with the help of dynamic impact simulations of the coach structure.
The quantification of occupant injury was done by occupant safety simulations using the Hybrid III 50th percentile male dummy FE model. The dummy having been designed for simulating automobile accident scenarios, its contacts had to be adapted to suit the excessive mobility conditions in the coach interior. The dummy was revalidated successfully for the head drop test, pendulum chest impact test, neck flexion and extension test and knee impact test. Impact simulations for three different speeds were performed by positioning the dummy close to the impact point. Injury criteria such as Head Injury Criterion, Chest Deceleration, Knee force level and Neck extension-flexion moments were used to estimate the injury severity level and fatality rate.
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Zajišťovací mechanismus kontejneru / Safety container mechanismKubín, Martin January 2008 (has links)
This diploma thesis is focused on container safety mechanism which is a part of truck trailers. It designs pneumatic – mechanical safety mechanism suitable for safe transport of container with driving drum which are produced according to German standard DIN 30 722. It concerns containers with total weight of 22 tons. The first part of this thesis is focused on evaluation of possible load by common operating conditions. The technique of mechanism design is introdiced in several developing stages from original solution to final version. The final version processes all force and kinetic aspects. Selected parts of safety mechanism are controlled from solidity perspective. Some calculations and analysis were processed both by convention method and method of final elements on PC. Thesis was created in close cooperation with company SVAN Chrudim, s.r.o.
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Vybrané faktory volby dopravního prostředku na trase Praha-Mnichov v kontextu plánované výstavby vysokorychlostní železnice / Selected factors of mode choice on the Prague-Munich route in the context of the planned high-speed rail constructionPetříček, Jakub January 2020 (has links)
The aim of this thesis is to define in more detail a safety factor, a factor of passage of time and an ecological behaviour factor influencing the mode choice on the Prague-Munich route in relation to railway as a reference mode, and to estimate the change in mode choice after HSR completion with emphasis on defined factors. The work qualitatively analyzes the sets of ideas and understandings of selected factors, which in turn affect the travel behavior and the mode choice. Defining these factors creates space for estimating and proposing perspectives for the development of expected travel behavior in the context of the planned HSR system on the Prague-Munich route. The presented thesis discusses and interprets the comparison of selected factors between existing modes of transport. The significance of the thesis lies in the understanding and definition of selected factors that are important for HSR planning strategies between Prague and Munich. Keywords: high-speed rail, travel behaviour, transport safety perception, perception of time, grounded theory, theory of planned behavior
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