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Wyświetlanie 1-5 z 5
Tytuł:
Assessment of railway lines: an efficiency rating analysis for baltic countries
Autorzy:
Vaičiūnas, G.
Powiązania:
https://bibliotekanauki.pl/articles/375497.pdf
Data publikacji:
2018
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
rail Baltica
railway line
train
container train
geometric mean
Rail Baltica
linia kolejowa
pociąg
pociąg kontenerowy
średnia geometryczna
Opis:
The article investigates a possibility of using the traditional multi-criteria assessment methods to evaluate how significance of a railway line is distributed for the countries it crosses. The article analyses two examples of railway lines: the railway line Rail Baltica (Poland, Lithuania, Latvia and Estonia) and the container train Viking route (Lithuania, Belarus and Ukraine). When investigating for which countries the Rail Baltica project will have bigger significance, and for which smaller, indicators of the countries are analysed by the length of Rail Baltica in the country, length falling per million residents in the country, length falling per thousand km of the existing railway, length per area of the county and length falling per country’s gross domestic product (GDP). To generalize them, multi-criteria optimization methods, such the geometric mean method, were used. To answer the question whether the methodology used is adequate, it was tested using the example of the already operating container train Viking. The results of calculations for the previously mentioned criteria are combined with the actual distribution of the freight turnover. A positive conclusion is made about the adequacy of the methodology to assessment of the importance of the railway line for the country.
Źródło:
Transport Problems; 2018, 13, 1; 49-58
1896-0596
2300-861X
Pojawia się w:
Transport Problems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Steel relieving constructions in mining areas as temporary or permanent railway bridges
Autorzy:
Bętkowski, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/1841176.pdf
Data publikacji:
2020
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
temporary viaduct
bridge
mining area
damage
railway line
relieving construction
wiadukt tymczasowy
most
teren górniczy
uszkodzenie
linia kolejowa
konstrukcja odciążająca
Opis:
This article describes three examples of bridge-type relieving constructions located on railway lines in the areas of active mining exploitation. It discusses how to take into account mining influences and how to support a temporary relieving construction on the railway embankment. This article discusses the incorrect solutions and their consequences. The first example involves the protection of train traffic continuity during the replacement of bridge span under an intensively used railway line. The second example shows the incorrect use of the relieving construction, leading to the relaxation of soil ground base and failure of a small brick arch railway bridge. The third example describes the use of the relieving construction as a permanent span of the railway bridge locates in the area where mining subsidence is over 14 m. The railway line locates on the third bridge; it is a single-track line, which is the only way to transport coal and equipment needed for operation in a large underground coal mine; interruptions of railway traffic longer than 4 working days (5 consecutive days) are unacceptable. This article has basic information about the effects of mining impacts, bridge-type steel relief constructions and a theoretical introduction enabling analysis of interactions of temporary supports and embankment in mining areas. All examples, especially the third one, contribute to development of knowledge in the field of civil engineering and transport.
Źródło:
Transport Problems; 2020, 15, 2; 107-118
1896-0596
2300-861X
Pojawia się w:
Transport Problems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of the running of long-distance trains on non-electrified lines in Poland
Autorzy:
Kamiński, Wojciech
Powiązania:
https://bibliotekanauki.pl/articles/27314071.pdf
Data publikacji:
2023
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
railway transport
railway line
diesel locomotive
long distance train
train cancellation
transport kolejowy
linia kolejowa
lokomotywa spalinowa
pociąg dalekobieżny
odwołanie pociągu
Opis:
In recent years, the number of long-distance trains running on non-electrified lines has been increasing in Poland. Unfortunately, trains running on non-electrified lines, unlike those running on the hook of electric locomotives, are very often canceled, especially in the winter. In this research, the analysis of which lines had the most frequent cancellations of trains in 2021 and the reasons for these cancellations were analyzed. The results show that the most common cause of train cancellations was the lack of an efficient locomotive at the starting station. Most often, accessibility problems concern Czech series 754 diesel locomotives. The numbers of canceled trains in February 2021 and 2022 were also compared. The comparison showed that although the situation is far from ideal, it has improved significantly.
Źródło:
Transport Problems; 2023, 18, 1; 19--32
1896-0596
2300-861X
Pojawia się w:
Transport Problems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of traction rolling-stock using in Lithuanian sector of railway line "Rail Baltica"
Autorzy:
Bureika, G.
Powiązania:
https://bibliotekanauki.pl/articles/374441.pdf
Data publikacji:
2012
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
linia kolejowa "Rail Baltica"
sprawność taboru kolejowego
koszty eksploatacji
metody wielokryterialnej oceny
railway line Rail Baltica
freight diesel locomotives
rolling-stock efficiency
operation costs
multicriteria evaluation methods
Opis:
The article analyses the current traction rolling-stock used by „Lietuvos geležinkeliai“ Plc. for freight transportation. The technical data of the above mentioned rolling-stock is explored and compared, and operation costs are estimated in the article. After the assessment of the forecasts of freight flows on the constructed railway „Rail Baltica“, the algorithm for selection of freight locomotives was proposed. The efficiency of the locomotives operated on the railway is determined by three multicriteria evaluation methods: the sum of ratings, simple additive weighting, and the geometric mean method. Locomotives are valued in accordance with technical, economic and ecological parameters. The results of possible effective performance of the rolling stock have been determined by changing coefficient values of the criteria. Finally, basic conclusions are given.
Źródło:
Transport Problems; 2012, 7, 4; 49-56
1896-0596
2300-861X
Pojawia się w:
Transport Problems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Methods of substantiation of specialization of railway lines
Autorzy:
Borodin, A.
Prokofieva, E.
Powiązania:
https://bibliotekanauki.pl/articles/374914.pdf
Data publikacji:
2017
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
specialization
railway lines
passenger and freight traffic
transport services
economic efficiency
transport flows
investment measures
compromise operation
specjalizacja
linia kolejowa
ruch pasażerski i towarowy
usługi transportowe
efektywność ekonomiczna
przepływy transportowe
środki inwestycyjne
działanie kompromisowe
Opis:
The article proposes methodological principles for substantiating the specialization of main railway lines based on the primary types of passenger or freight traffic in order to improve the level of transport services, economic efficiency, and reliability of the transportation process. The search for a solution to the problem provides a rational distribution of transport flows and investment measures, with the subsequent finding of a compromised operation for a set of effective alternatives.
Źródło:
Transport Problems; 2017, T. 12, z. spec.; 35-44
1896-0596
2300-861X
Pojawia się w:
Transport Problems
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-5 z 5

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