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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
401

[en] RAILROAD CARGO TRANSPORTATION IN BRAZIL: CASE STUDY OF FUEL TRANSPORTATION IN SOUTH REGION / [pt] O TRANSPORTE FERROVIÁRIO DE CARGA NO BRASIL: ESTUDO DE CASO DO TRANSPORTE DE COMBUSTÍVEIS NA REGIÃO SUL

CLAUDIA DUMIT 24 April 2006 (has links)
[pt] Esta dissertação aborda a evolução da malha ferroviária brasileira e o impacto deste modal de transporte nos estoques de Diesel e Gasolina das Bases de Distribuição localizadas no Sul do Brasil, pertencentes a uma importante distribuidora de derivados de petróleo. A relevância do estudo realizado deve-se à aprovação da Lei 9.478 - Lei do Petróleo - que quebrou o monopólio da Petrobras neste setor, transferindo para as distribuidoras o gerenciamento espacial e volumétrico de seus estoques. Por outro lado, o estudo contribui para o conhecimento da incipiente malha ferroviária brasileira, a partir da privatização ocorrida em 1996, e tornada importante diante da crescente necessidade de se agregar valor, eficiência e segurança ao transporte de combustíveis. O objetivo deste estudo é abordar a evolução da malha ferroviária brasileira e o impacto deste modal de transporte nos estoques de segurança de Diesel e Gasolina de uma grande Distribuidora de derivados de petróleo e o relacionamento dos custos de transporte atrelados aos riscos e impontualidade ainda prevalecentes no sistema ferroviário. / [en] This thesis approaches the evolution of the Brazilian railroad mesh and the impact of this modal of transportation to an important company in the supplies of Diesel and Gasoline to the Bases of Distribution located in the South of Brazil. The relevance of this study is justified due to the approval of Law 9.478 - Law of the Oil - that broke the monopoly of Petrobras in this sector, transferring to oil companies the spatial and volumetric management of their oil inventories. On the other hand, the study contributes for the knowledge of the incipient Brazilian railroad mesh, privatized in 1996, and becoming increasingly important giving the necessity of adding value, efficiency and security to the fuel transportation. The objective of the present study is the evolution of railroad mesh and the impact of this transportation modal on Gasoline and Diesel safety stocks handled by an important oil company and its relationship to the costs of transportation related to the risks and unpunctuality still prevailing in the railroad system.
402

Incident management in the mass transit railway

Tang, Chi-chung. January 2007 (has links)
Thesis (M. A.)--University of Hong Kong, 2007. / Title proper from title frame. Also available in printed format.
403

Low volume grade crossing treatments for the Oregon high speed rail corridor

Zaworski, David D. 30 April 1996 (has links)
This study defines the information gathering and communication and response needed for safety at highway-rail crossings. It examines technologies for low-cost, high-safety treatments for low volume highway crossings of higher speed (130-200 kph) rail. Crossing closure and consolidation is a necessary first step. Existing train control and crossing safety systems are examined. Intelligent Transportation System technologies are examined for applicability to the information gathering, communicating, and control functions of grade crossing safety. Guidelines are offered for low volume crossings of the high speed rail line in Oregon. A preliminary cost benefit analysis is presented. Above 200kph, crossing closure or grade separation is required. In the range of 130-200 kph, ITS technologies have the potential to enhance crossing safety at much lower cost than grade separation. A global positioning system based positive train control system provides the train location and speed information needed for advanced crossing control. A traffic management center can receive train and crossing information, operate crossing systems, and grant clearance for train or highway users through the crossing. Remote lock gates provide safety at private crossings. Increased traveler information and four quadrant warning gates increase motorist compliance at public crossings. At train speeds above 175 kph, barrier gates protect rail movements. Video monitoring and detection systems provide reliable, redundant information should a vehicle become trapped in a crossing. / Graduation date: 1996
404

A microsimulation analysis of highway intersections near highway-railroad grade crossings

Tydlacka, Jonathan Michael 15 November 2004 (has links)
The purpose of this thesis was to perform microsimulation analyses on intersections near Highway-Railroad Grade Crossings (HRGCs) to determine if controlling mean train speed and train speed variability would improve safety and reduce delays. This research focused on three specific areas. First, average vehicle delay was examined, and this delay was compared for seven specific train speed distributions, including existing conditions. Furthermore, each distribution was associated with train detectors that were placed at the distance the fastest train could travel during the given warning time. Second, pedestrian cutoffs were investigated. These cutoffs represented an occasion when the pedestrian phases were truncated or shortened due to railroad signal preemption. Finally, vehicle emissions were analyzed using a modal emissions model. A microscopic simulation model of the Wellborn Corridor in College Station, Texas was created using VISSIM. The model was run twenty times in each train speed distribution for each of three train lengths. Average vehicle delay was collected for three intersections, and delays were compared using the Pooled t-test with a 95% confidence interval. Comparisons were made between the distributions, and generally, distributions with higher mean train speeds were associated with lower average delay, and train length was not a significant factor. Unfortunately, pedestrian cutoffs were not specifically controlled in this project; therefore, no statistical conclusions can be made with respect to the pedestrian cutoff problem. However, example cases were devised to demonstrate how these cutoffs could be avoided. In addition, vehicle emissions were examined using the vehicle data from VISSIM as inputs for CMEM (Comprehensive Modal Emissions Model). For individual vehicles, as power (defined as the product of velocity and acceleration) increased, emissions increased. When comparing emissions from different train speed distributions, few significant differences were found. However, a scenario with no train was tested, and it was shown to have significantly higher emissions than three of the distributions with trains. Ultimately, this thesis shows that average vehicle delay and vehicle emissions could be lowered by specific train speed distributions. Also, work could be done to investigate the pedestrian cutoff problem.
405

A microsimulation analysis of highway intersections near highway-railroad grade crossings

Tydlacka, Jonathan Michael 15 November 2004 (has links)
The purpose of this thesis was to perform microsimulation analyses on intersections near Highway-Railroad Grade Crossings (HRGCs) to determine if controlling mean train speed and train speed variability would improve safety and reduce delays. This research focused on three specific areas. First, average vehicle delay was examined, and this delay was compared for seven specific train speed distributions, including existing conditions. Furthermore, each distribution was associated with train detectors that were placed at the distance the fastest train could travel during the given warning time. Second, pedestrian cutoffs were investigated. These cutoffs represented an occasion when the pedestrian phases were truncated or shortened due to railroad signal preemption. Finally, vehicle emissions were analyzed using a modal emissions model. A microscopic simulation model of the Wellborn Corridor in College Station, Texas was created using VISSIM. The model was run twenty times in each train speed distribution for each of three train lengths. Average vehicle delay was collected for three intersections, and delays were compared using the Pooled t-test with a 95% confidence interval. Comparisons were made between the distributions, and generally, distributions with higher mean train speeds were associated with lower average delay, and train length was not a significant factor. Unfortunately, pedestrian cutoffs were not specifically controlled in this project; therefore, no statistical conclusions can be made with respect to the pedestrian cutoff problem. However, example cases were devised to demonstrate how these cutoffs could be avoided. In addition, vehicle emissions were examined using the vehicle data from VISSIM as inputs for CMEM (Comprehensive Modal Emissions Model). For individual vehicles, as power (defined as the product of velocity and acceleration) increased, emissions increased. When comparing emissions from different train speed distributions, few significant differences were found. However, a scenario with no train was tested, and it was shown to have significantly higher emissions than three of the distributions with trains. Ultimately, this thesis shows that average vehicle delay and vehicle emissions could be lowered by specific train speed distributions. Also, work could be done to investigate the pedestrian cutoff problem.
406

What makes a city? planning for "quality of place" : the case of high-speed train station area redevelopment /

Trip, J. J. January 2007 (has links)
Thesis (doctoral)--Delft University of Technology, 2007. / "Delft Centre for Sustainable Urban Areas"--Cover. "Erratum" inserted. Includes bibliographical references (p. 235-248).
407

TOD and travel behavior in Hong Kong: a studyon the effectiveness and better usage of the current railway systemMTR

Cheung, Chui-ying., 張翠盈. January 2011 (has links)
published_or_final_version / Urban Planning and Design / Master / Master of Science in Urban Planning
408

Urban transition: redevelopment of Guangzhou East Railway Station frontage space

Xie, Xun, 谢洵 January 2010 (has links)
published_or_final_version / Architecture / Master / Master of Landscape Architecture
409

Timber railway bridges and viaducts in the United Kingdom : 1835-1870

Bill, Nicholas Aaron January 2013 (has links)
No description available.
410

Some economic effects of full-crew laws upon the railroad industry

King, Clay Brooks, 1939- January 1964 (has links)
No description available.

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