1. How the volume of traffic affected air quality during the extreme event of COVID-19 lockdown in a small cityBranka Trček, Rok Kamnik, 2022, izvirni znanstveni članek Opis: The extreme traffic measures during the COVID-19 lockdown provided a unique opportunity to gain better insight into the relationship between traffic characteris-tics and NO2 concentrations in Maribor, a small Slove-nian city. NO2, traffic and meteorological data were sta-tistically processed in detail for March and April 2018, 2019 and 2020 to get a historical insight and to exclude the specifics of the lockdown period. The extreme event resulted in an average reduction of road traffic of 42%. The decrease in the number of passenger cars ranged from 33.9 to 60.3% per day with the largest decrease on the motorway. Daily averages of heavy goods traffic de-clined on the motorway and the expressway by 24.6% and 7%, respectively. Traffic characteristics were reflect-ed in a 24–27% decrease in NO2 concentrations at the urban station. The change is smaller than the change in traffic volume, which could be explained by the change in the composition of the vehicle fleet due to the increase in NO2-dominant traffic sources, e.g. diesel heavy goods vehicles. The presented results are relevant for improv-ing air quality and sustainable mobility management in small cities. They highlight the important role of reor-ganisation of heavy goods traffic in urban logistics.
Ključne besede: road traffic, extreme event, COVID-19 lockdown, NO2 emissions, meteorological conditions, air pollution
Objavljeno v DKUM: 13.03.2025; Ogledov: 0; Prenosov: 1
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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, izvirni znanstveni članek Opis: 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.
Ključne besede: black carbon, black carbon concentration, traffic pollution, air pollution, wind, traffic density, logistics, basin city
Objavljeno v DKUM: 20.08.2024; Ogledov: 44; Prenosov: 10
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3. Infrastructure planning and environmental protection : case study of SlovakiaMarián Gogola, Daniela Durcanska, Marta Hocova, 2016, samostojni znanstveni sestavek ali poglavje v monografski publikaciji Ključne besede: infrastructure planning, environmental protection, air pollution, transportation, traffic, emissions, Slovakia
Objavljeno v DKUM: 10.05.2018; Ogledov: 8489; Prenosov: 102
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4. Theoretical model for determination of airspace capacityBranko Lučovnik, Martin Lipičnik, Domenik Lebar, Janko Blatnik, 2002, pregledni znanstveni članek Opis: In the last decade, the constant air traffic growth has brought certain problems as well. While aircraft production and airline functioning are being stimulated by the competition, the situation in air traffic control and in infrastructure component is completely different. Air traffic management (ATM) is still owned by the state. The state, however, is known for the fact of not being a good manager and is solving problems slowly and not efficiently because of its large administration. There is a very strong trade union movement functioning in ATM system, which makes several rational decisions impossible. Critics of the current ATM system in Europe warn of increasing problems-delays and operational expenses. The control component is the only one among the four components of air traffic, which has not been liberalised and harmonised yet. There is no competition in the fields of air traffic. All matters are taken care of by CAA or by semi-private companies, owned by the state. According to air carriers which have to put in 4-9% of business expenses into terminal-and over-flights charges, these expenses are far too heavy a burden.
Ključne besede: air traffic, airspace capacity
Objavljeno v DKUM: 06.06.2017; Ogledov: 1463; Prenosov: 198
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5. Terminal airspace capacity modelMilan Janić, Vojin Tošić, 1982, izvirni znanstveni članek Opis: The objective of the research described in this paper was to produce a model for the analysis of terminal airspace capacity and the sensitivity of this capacity to the parameters which influence it. The model developed is based onthe concept of an expected ultimate capacity and applies to arriving traffic under saturation conditions i.e. a constant demand for service. It is possible to use the model for planning and operational purposes: for the computation of terminal airspace capacity, the separation of aircraft at the terminal entry gates so as to provide maximum capacity, and for heuristic optimization of arriving aircraft trajectories through the terminal airspace. For a sensitivity analysis the model allows for changes in terminal airspace geometry, runway(s) in use, arriving aircraft trajectories, arriving traffic distribution between the terminal airspace entry gates, aircraft type mix, aircraft velocities and air traffic control separation rules.
Ključne besede: air traffic, capacity model, terminal traffic
Objavljeno v DKUM: 05.06.2012; Ogledov: 1812; Prenosov: 112
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6. Transport and tourismStephen Page, 1999, učbenik za višje in visoke šole Ključne besede: tourism, tourist industry, transport, traffic, travel, multidisciplinary approach, industries, infrastructure, supply, demand, management, services, quality, air traffic, enterprises, directories
Objavljeno v DKUM: 01.06.2012; Ogledov: 2794; Prenosov: 58
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