1. Spatial modelling of modal shift due to COVID-19Simona Šinko, Klemen Prah, Tomaž Kramberger, 2021, original scientific article Abstract: The outbreak of COVID-19 caused many changes in people's life. One of the most significant is the travel behaviour and transport mode choice. This study focus on the changes that the inhabitants of Vienna made in their travel choices because of the virus. The same research about spatial modelling the transport mode choice of commuters in Vienna was completed in 2019 and is a topic addressed in our previous work. Based on our developed methodology, this article indicates that public transport is not a dominant transport mode choice as it was before the virus outbreak.The main result of this paper is geographically defined areas of application of individual alternatives shown on the final map of modal shift in Vienna, which could provide theoretical support for policy-makers and transportation planners. For the city of Vienna, we found that the area of the city where cars are now used has increased, which certainly has a negative impact on air quality and life in the city. The advantage of the methodology is that it can also be applied to other cities in the world.
Keywords: coronavirus, city traffic, urban mobility, transport mode choice, passenger transport, geographical methods, spatial modelling, city logistics, Vienna
Published in DKUM: 14.10.2024; Views: 0; Downloads: 17
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2. Traffic density-related black carbon distribution : impact of wind in a basin townBorut Jereb, Brigita Gajšek, Gregor Šipek, Špela Kovše, Matevž Obrecht, 2021, original scientific article Abstract: Black carbon is one of the riskiest particle matter pollutants that is harmful to human health. Although it has been increasingly investigated, factors that depend on black carbon distribution and concentration are still insufficiently researched. Variables, such as traffic density, wind speeds, and ground levels can lead to substantial variations of black carbon concentrations and potential exposure, which is even riskier for people living in less-airy sites. Therefore, this paper "fills the gaps" by studying black carbon distribution variations, concentrations, and oscillations, with special emphasis on traffic density and road segments, at multiple locations, in a small city located in a basin, with frequent temperature inversions and infrequent low wind speeds. As wind speed has a significant impact on black carbon concentration trends, it is critical to present how low wind speeds influence black carbon dispersion in a basin city, and how black carbon is dependent on traffic density. Our results revealed that when the wind reached speeds of 1 ms-1 , black carbon concentrations actually increased. In lengthy wind periods, when wind speeds reached 2 or 3 ms-1 , black carbon concentrations decreased during rush hour and in the time of severe winter biomass burning. By observing the results, it could be concluded that black carbon persists longer in higher altitudes than near ground level. Black carbon concentration oscillations were also seen as more pronounced on main roads with higher traffic density. The more the traffic decreases and becomes steady, the more black carbon concentrations oscillate.
Keywords: black carbon, black carbon concentration, traffic pollution, air pollution, wind, traffic density, logistics, basin city
Published in DKUM: 20.08.2024; Views: 44; Downloads: 8
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3. Management of traffic congestion in urban areasVilibald Premzl, 2000, review article Abstract: The use of road vehicles is increasing, the benefits they afford have been progressively diminished by external costs. Whereas traffic increases as we approach the centre, the road and open space decreases. The greater specialisation allows the city growth in size and in traffic attraction. In this way urban growth feeds itself. Inter-urban transport facilities also become more extensive. Growth in size of the city generates greater amounts of traffic and can eventually give rise to agglomeration diseconomies. Higher transport costs, offices and shops, attracted by the accessibility of central locations, gradually replace residential uses, people being forced to seek housing in the suburbs. As the urban area expands and offices in the city centre are built denser and higher, traffic congestion increases. This may result in the fall in central land values, since accessibility diminishes with the saturation of transport network. Increased pollution takes various forms as noise, smoke and overcrowded housing in the centre, urban decay in the transitional zone as commercial development is anticipated.
Keywords: road traffic, urban traffic, city growth, traffic congestion
Published in DKUM: 02.06.2017; Views: 1497; Downloads: 214
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4. Modeling of city logisticsSabrina Trafela, 2013, master's thesis Abstract: Master thesis has it's fundamentals in the use of theoretical methods for modeling purposes on the case study of city logistics and modeling of traffic flow and transportation problem on the city of Győr, Hungary.
In practical part, we made a measurements of traffic flow on street sections in the city of Győr. With Android application, we gathered necessary data. We also prepared maps of the route sections of the city from various entry points to the final, destination point. Purpose of our thesis was finding the optimal solution for the delivery to the city centre with the use of strategic games.
Final step was a preparation of mathematical model in Mathematica programming environment, which gave us results, but most important is the development of the model itself. Model is constructed in a way that can be use in various possible situations and on different city centres or case studies.
Keywords: city logistics, strategic games, Nash Equilibrium, modeling of traffic flow
Published in DKUM: 17.10.2013; Views: 2189; Downloads: 137
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5. Improving city transport with the objective to reduce CO2 emissionsMarjan Sternad, Matjaž Knez, Bojan Rosi, 2010, original scientific article Abstract: In the past few years traffic volume is increasing. As a consequence, negative external traffic effects are increasing too, in particular CO2 emissions, which result in global warming and climate changes. CO2 emissions, a by-product of vehicles are much higher in cities due to traffic density. According to European standards, Celje is not a large city; however its traffic poses a great problem that the city authorities will soon be confronted with. This paper focuses on the city centre of Celje, where traffic flow was measured and CO2 emissions calculated. Using alternative solutions the aim was to present impacts on the environment in the municipality of Celje in an event of changed traffic regimes. In order to reach the guidelines of sustainable transport development in the municipality of Celje, in the future, different measures for reducing negative external effects of city transport will have to be put into force, for only this way the quality of city life can be improved and compatibility of environmental, economic and social objectives provided.
Keywords: city transport, traffic effects, CO2 emmisions, sustainable development, urban environment, systemic approach
Published in DKUM: 05.06.2012; Views: 2492; Downloads: 144
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