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Dissertations / Theses on the topic 'Railroad track'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Fesharaki, Mohammad. "3-D Dynamic Analysis of High-Speed Railroad Track." FIU Digital Commons, 2017. http://digitalcommons.fiu.edu/etd/3366.

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High-Speed Rail (HSR) as a fast, reliable and environmentally friendly mode of transportation has received a lot of attention in recent decades. The International Union of Railways reported that there are more than 18600 miles of HSR in operation and about 1.6 billion passengers per year are carried by them. Although there are plans for HSR in many states including Florida, the United States, however, is still hesitant to develop its own HSR network. One of the main barriers to developing high-speed rail is excessive vibration propagation to the media which may cause annoyance to people who li

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2

Wehbi, Mohamed. "Developing a novel technique to extract track stiffness information from track geometry measurement." Thesis, University of Birmingham, 2016. http://etheses.bham.ac.uk//id/eprint/6722/.

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Railway tracks deteriorate over time due to the combined effects of train loads and environment. To carry out appropriate maintenance, it is necessary to measure the condition of the track. There are two broad categories of condition measures namely: function and structural measures of conditions. Functional measures of condition assess the condition of the track from the point of view of the user. An example of a commonly used functional measure of condition is track geometry. In the UK, track geometry is measured by the track recording coach and it is carried frequently on the entire network

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3

Romps, John F. (John Francis). "Modelling track maintenance and its effects on the reliability of a single track railroad line." Thesis, Massachusetts Institute of Technology, 1993. http://hdl.handle.net/1721.1/12397.

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4

Man, Amnon Pieter de. "Dynatrack a survey of dynamic railway track properties and their quality /." Delft, the Netherlands : Delft University Press, 2002. http://books.google.com/books?id=UydSAAAAMAAJ.

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5

Khadem, Sameni M. "Railway track capacity : measuring and managing." Thesis, University of Southampton, 2012. https://eprints.soton.ac.uk/348816/.

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This thesis adopts a holistic approach towards railway track capacity to develop methodologies for different aspects of defining, measuring, analysing, improving and controlling track capacity utilisation. Chapter 1 presents an overview of the concept of capacity and the railway capacity challenge is explained. Chapter 2 focuses on past approaches to defining and analysing the concept of railway capacity. Existing methods for estimating capacity utilisation are studied in four categories: analytical methods, parametric models, optimisation and simulation. Chapter 3 examines various factors aff

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6

Zhang, Yu-Jiang. "An integrated rail track degradation model." Thesis, Queensland University of Technology, 2000. https://eprints.qut.edu.au/36110/7/36110_Digitised%20Thesis.pdf.

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There has been a worldwide trend to increase axle loads and train speeds. This means that railway track degradation will be accelerated, and track maintenance costs will be increased significantly. There is a need to investigate the consequences of increasing traffic load. The aim of the research is to develop a model for the analysis of physical degradation of railway tracks in response to changes in traffic parameters, especially increased axle loads and train speeds. This research has developed an integrated track degradation model (ITDM) by integrating several models into a comprehensive

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7

Stith, Jason C. "RAILROAD TRACK PRESSURE MEASUREMENTS AT THE RAIL/TIE INTERFACE USING TEKSCAN SENSORS." UKnowledge, 2005. http://uknowledge.uky.edu/gradschool_theses/213.

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It has been desirable for years to develop non-intrusive/non-invasiveprocedures to determine the pressures and stresses at various levels andinterfaces in the railroad track structure in order to optimize track designs andimprove subsequent track performance. Recent research has developedsatisfactory procedures for measuring pressures in the track structure at theballast/subballast/subgrade levels using earth pressure cells. The researchreported in this thesis documents the development of a technique for measuringthe pressures in the track, at the rail/tie plate/tie interfaces, using a very th

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8

Daheshpour, Kasra. "Network level decision support system to assess railway track maintenance needs." Thesis, University of Birmingham, 2018. http://etheses.bham.ac.uk//id/eprint/8164/.

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Maintenance management decision-support systems are needed to help senior decision-makers and asset managers to better plan timely and efficient maintenance. Within the railway industry, several maintenance management decision-support systems have been developed. However, most these operate at project level where decisions are limited to short sections of track. Network level maintenance management systems enable future prediction of the condition of the railway network under different allocation of resources in a manner to provide acceptable levels of safety, reliability and cost. This projec

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9

Gong, Cencen. "The interaction between railway vehicle dynamics and track lateral alignment." Thesis, University of Huddersfield, 2013. http://eprints.hud.ac.uk/id/eprint/19755/.

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This thesis examines the effect of vehicle dynamics on lateral deterioration of the track alignment. As rail traffic runs along a route, the forces imposed upon the track cause the ballast to settle, and hence the track geometry deteriorates. At a specified value of deterioration the track geometry needs to be restored by tamping or other methods. As the deterioration is mainly in the vertical direction, this aspect has been more widely studied and models have been developed to predict vertical track geometry deterioration. On the other hand, lateral track deterioration is not as well understo

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10

Le, Pen Louis. "Track behaviour : the importance of the sleeper to ballast interface." Thesis, University of Southampton, 2008. https://eprints.soton.ac.uk/73284/.

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The aim of this research is to develop a fuller understanding of the mechanical behaviour of the sleeper/ballast interface, related in particular, to the forces applied by high speed tilting trains on low radius curves. The research has used literature review, field measurements, and laboratory experiments on a single sleeper bay of track. Theoretical calculations are also presented. Field measurements are carried out using geophones to record time/deflection for sleepers during passage of Pendolino trains on the West Coast Main Line. Calculations are presented to quantify normal and extreme m

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11

Jain, Ashish. "Discrete Element Modeling of Railway Ballast for Studying Railroad Tamping Operation." Thesis, Virginia Tech, 2018. http://hdl.handle.net/10919/91438.

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The development of Discrete Element Model (DEM) of railway ballast for the purpose of studying the behavior of ballast particles during tamping is addressed in a simulation study, with the goal of optimizing the railroad tamping operation. A comprehensive literature review of applicability of DEM techniques in modeling the behavior of railway ballast is presented and its feasibility in studying the fundamental mechanisms that influence the outcome of railroad tamping process is analyzed. A Discrete Element Model of railway ballast is also developed and implemented using a commercially availabl

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12

Frohling, Robert Desmond. "Deterioration of railway track due to dynamic vehicle loading and spatially varying track stiffness." Thesis, Pretoria : [s.n.], 1997. http://upetd.up.ac.za/thesis/available/etd-01122009-160350.

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13

Hagaman, Brian Rodney. "Optimisation of 1067 mm gauge railway track under static and dynamic loading." Thesis, Queensland University of Technology, 1989. https://eprints.qut.edu.au/36453/1/36453_Hagaman_1989.pdf.

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This research study has concentrated on the invest~gation -of 1067 mm gauge railway track in order to provide optimum track standards. In addition an improved understanding has been obtained of the quasi-static and dynamic force levels exerted on the track structure and the indi victual track elements. The performance of resilient rail pads in attenuating dynamic stresses in concrete sleepers and the rail has been quantified. Rail head wear limits have been recommended for 1067 mm gauge track for a range of axle loads and train speeds. Significant potential savings of over $Al. 5 mil

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14

D'Angelo, Giacomo. "Bitumen stabilised ballast : a novel track-bed solution towards a more sustainable railway." Thesis, University of Nottingham, 2018. http://eprints.nottingham.ac.uk/55089/.

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Ballasted track represents by far the most used infrastructure for railway transportation system, its main benefits being the relatively low construction costs, the maintainability, the relatively high damping capacity, noise absorption and high flexibility, the self-adjusting properties and high hydraulic conductivity. These are related to the structure of ballast layer as assembly as well as to particle properties. However, the unbound nature of ballast layer is also responsible for the reduction of geometric quality of the track, and therefore, its safety and ride comfort. The passage of tr

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15

Chen, Cheng. "Discrete element modelling of geogrid-reinforced railway ballast and track transition zones." Thesis, University of Nottingham, 2013. http://eprints.nottingham.ac.uk/13399/.

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Track deterioration has a serious influence on the safety and efficiency (speed restriction) of train operations. Many expensive, disruptive and frequent repair operations are often required to maintain the ballast characteristics due to the problem of settlement. Because of this, a geogrid solution that has proved to be a simple and economical method of reinforcing track ballast is widely used. This project presents an evaluation of the behaviour of geogrid-reinforced railway ballast. Experimental large box pull-out tests were conducted to examine the key parameters influencing the interactio

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16

Lawton, Alan. "The dynamic interaction between a magnetically levitated vehicle and a flexible track." Thesis, University of Nottingham, 1988. http://eprints.nottingham.ac.uk/11527/.

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The only commercially operating magnetically levitated (maglev) transport system in the world is the link between Birmingham International Airport and the National Exhibition Centre. Comparative financial analysis for this route showed that the construction costs for both wheeled and maglev systems were similar and that the cost of the guideway accounted for over 70% of the total. In part this was because the guideway was elevated; a likely requirement for any future urban system. A substantial reduction in installation costs for a system of this nature can only be achieved by the use of cheap

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17

Kramp, Kenneth P. "The Analysis and Creation of Track Irregularities Using TRAKVU." Thesis, Virginia Tech, 1998. http://hdl.handle.net/10919/36861.

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The accuracy of the results from a rail vehicle dynamic model is dependent on the realism of the track input to the model. An important part of the track input is the irregularities that exist on actual track. This study analyzes the irregularities inherent in railroad track geometry data, and provides an analytical method for creating track data with the irregularities for use as the input to a dynamic model. Track data, measured from various classes of track, was examined using statistical and frequency analysis techniques to identify any similarities in the characteristics of the irregul

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18

Safari, Baghsorkhi Mohammad. "Experimental investigation of the effect of the ballast/sleeper interventions on railway track performance." Thesis, University of Nottingham, 2017. http://eprints.nottingham.ac.uk/39277/.

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Railways are integral to the transportation system of a growing economy. There is a constant demand by numerous stakeholders of the railway industry for greater train operational speeds, tonnage, passenger comfort and safety with minimal service disruptions. This is partly achievable through the improvement of the main components of railway track. A fundamental requirement for any railway track is to be able to maintain its as-built geometry over its service life. Settlement of a ballasted railway track is mainly caused by cyclic loading due to the passage of traffic. To return the rail track

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19

Mohammad, Fouad Abbas. "Analysis and design of the LR55 track system." Thesis, Liverpool John Moores University, 1998. http://researchonline.ljmu.ac.uk/4952/.

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20

Tusing, Donald S. "Modular track panels for improved safety in the mining transportation industry." Morgantown, W. Va. : [West Virginia University Libraries], 2003. http://etd.wvu.edu/templates/showETD.cfm?recnum=2853.

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Thesis (M.S.)--West Virginia University, 2003.<br>Title from document title page. Document formatted into pages; contains xiv, 158 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 141).

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21

Ahmad, Nazirah. "A methodology for developing high damping materials with application to noise reduction of railway track." Thesis, University of Southampton, 2009. https://eprints.soton.ac.uk/66183/.

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For application in damping treatments, elastomeric materials should have a high damping loss factor, but this is inevitably linked to a strong temperature-dependence of the dynamic properties. A methodology is developed that allows a material to be formulated for a particular damping application where temperature-dependence has to be taken into account. The methodology is applied to the case of a tuned absorber system used for damping the vibration of a railway track. This is required to be effective over a temperature range -20°C to 40°C. To investigate the effect of the temperature on the pe

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22

McHenry, Michael T. "PRESSURE MEASUREMENT AT THE BALLAST-TIE INTERFACE OF RAILROAD TRACK USING MATRIX BASED TACTILE SURFACE SENSORS." UKnowledge, 2013. http://uknowledge.uky.edu/ce_etds/15.

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The pressure distribution at the ballast-tie interface of railroad track plays a key role in overall track support. Failure of the ballast or tie can result from excessive loads that were not designed for, requiring increased maintenance and reducing railroad operating efficiency. Understanding the forces acting on the ballast and tie are required to design higher performance and longer lasting track. To further this understanding, the use of Matrix Based Tactile Surface Sensors (MBTSS) is employed to measure the actual pressure distribution at the ballast-tie interface, characterized by indiv

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23

Su, Bei. "EFFECTS OF RAILROAD TRACK STRUCTURAL COMPONENTS AND SUBGRADE ON DAMPING AND DISSIPATION OF TRAIN INDUCED VIBRATION." UKnowledge, 2005. http://uknowledge.uky.edu/gradschool_diss/312.

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A method for numerical simulation of train induced track vibration and wave propagation in subgrade has been proposed. The method uses a mass to simulate the bogie of a train and considers the effect of rail roughness. For this method, rail roughness is considered as a randomly generated signal and a filter is used to block the undesired components. The method predicts the particle velocity around the track and can be applied to many kinds of railroad trackbeds including traditional ballast trackbed and modern Hot mix asphalt (HMA) trackbed. Results from ballast and HMA trackbeds are compared

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Schwarz, Brandon A. (Brandon Alexander). "Evaluation of a methodology for detecting railroad track geometry anomalies and determining rail vehicle fatigue loads." Thesis, Massachusetts Institute of Technology, 1993. http://hdl.handle.net/1721.1/12401.

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25

Lake, Maree. "Optimum short-term scheduling of railway track maintenance / y Maree Rayelle Lake." Thesis, Queensland University of Technology, 2001.

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26

Ribeiro, Fernando Sgavioli. "Contribuição para análise do custo do ciclo de vida de um sistema de gerência de pavimento ferroviário." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/3/3138/tde-15012018-134934/.

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Uma nova abordagem de sistema de gerência de pavimentos ferroviários é exposta nesta tese. O objetivo principal da pesquisa foi o desenvolvimento de um sistema de gerência em nível de rede e análises do custo do ciclo de vida em nível de projeto, adotando como estudo de caso a Estrada de Ferro Vitória Minas. A revisão bibliográfica apresenta modelos de avaliação da qualidade geométrica e estrutural no Brasil e no mundo. O desenvolvimento iniciou-se com a composição do sistema de gerência em nível de rede utilizando um inventário do trecho em estudo, a subdivisão dessa via em segmentos homogêne

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27

Rowshandel, Hamed. "The development of an autonomous robotic inspection system to detect and characterise rolling contact fatigue cracks in railway track." Thesis, University of Birmingham, 2014. http://etheses.bham.ac.uk//id/eprint/4821/.

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At present, high speed dual purpose rail/road vehicles employing fixed non-destructive testing (NDT) sensors are used to inspect rails. Due to the uncertainties in characterisation of the defects when they are detected at high speed, manual re-visiting of the defects by expert operators is required before any decision regarding track maintenance is made. This research has been driven by a desire from the rail industry for a robotic system performing faster than human operators and being capable to both detect and characterise rolling contact fatigue (RCF) cracks in rails with the aim of automa

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Verlinde, Karel Jef Stefaan. "Finite element analysis of tubular track system." Thesis, Stellenbosch : Stellenbosch University, 2012. http://hdl.handle.net/10019.1/71741.

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Thesis (MScEng)--Stellenbosch University, 2012.<br>ENGLISH ABSTRACT: The Tubular Track (TT) railway system is a twin beam modular railway system consisting of two reinforced concrete (RC) beams on which steel rails are continuously supported. The beams are linked with galvanised steel gauge tie bars and continuously supported by soil foundations, and can be used to replace conventional sleeper and ballast railway support. The TT railway system has in the past been analysed with various analysis methods, but were found to obtain con icting results. The con icting results means that one of

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Munoz, Joshua. "Application of Multifunctional Doppler LIDAR for Non-contact Track Speed, Distance, and Curvature Assessment." Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/77876.

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The primary focus of this research is evaluation of feasibility, applicability, and accuracy of Doppler Light Detection And Ranging (LIDAR) sensors as non-contact means for measuring track speed, distance traveled, and curvature. Speed histories, currently measured with a rotary, wheel-mounted encoder, serve a number of useful purposes, one significant use involving derailment investigations. Distance calculation provides a spatial reference system for operators to locate track sections of interest. Railroad curves, using an IMU to measure curvature, are monitored to maintain track infrastr

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Cho, Hanseon. "Preemption strategy for traffic signals at intersections near highway-railroad grade crossings." Texas A&M University, 2003. http://hdl.handle.net/1969.1/406.

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Because the operational characteristics of signalized intersections near highway-railroad grade crossings (IHRGCs) are different from those of signalized intersections located elsewhere in the traffic system, standard operational strategies do not apply. This is because safe operation at IHRGCs takes precedence over all other objectives. Because the prime objective of the current preemption methods is to clear the crossing, secondary objectives such as safe pedestrian crossing time and minimized delay are given less consideration or ignored completely. Consequently, state-of-the-practice st

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Yeo, Graeme James. "Monitoring railway track condition using inertial sensors on an in-service vehicle." Thesis, University of Birmingham, 2017. http://etheses.bham.ac.uk//id/eprint/7531/.

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Effective maintenance of railway track is critical for the safe operation of any railway network. Efficient maintenance may also result in economic benefits for rail operators. The work in this thesis looks into how an inexpensive measurement system could be fitted to in-service railway vehicles such as commuter trains, to provide a relatively high frequency of measurement on their routes of operation, when compared to dedicated measurement vehicles. This thesis describes how a prototype inertial measurement system was designed and built, and fitted to a commuter train operating in the region

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32

Simson, Scott Andrew. "Development of a model for railway track maintenance planning." Thesis, Queensland University of Technology, 1999. https://eprints.qut.edu.au/36116/1/36116_Simson_1999.pdf.

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Track maintenance represents over 20 percent of Australian railway operating costs. Thus there is considerable incentive for rail corporations to reduce their maintenance costs. There is considerable research directed at improving track structures and maintenance techniques to reduce the track maintenance expenditure. However, there is little work on the planning of track maintenance that can be applied to Australian railway operations. This research reviews maintenance planning and finds that models currently available are empirical models reliant mainly on historical track condition data fr

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Lackenby, Joanne. "Triaxial behaviour of ballast and the role of confining pressure under cyclic loading." Access electronically, 2006. http://www.library.uow.edu.au/adt-NWU/public/adt-NWU20060808.144325/index.html.

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34

Wong, Wai. "A formal theory of railway track networks in higher-order logic and its applications in interlocking design." Thesis, University of Warwick, 1992. http://wrap.warwick.ac.uk/110541/.

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The research described in this dissertation centres on the application of a discipline of formal methods in railway signalling system design. A generic abstract model of railway track networks and signals has been developed in Higher-Order Logic(HOL). It consists of several theories arranged in a hierarchy. Railway track networks are modelled by a class of constraint labelled directed graphs. HOL theories of graphs and paths have been developed for representing track networks. HOL theories modelling individual track components and signals have also been developed. These theories are then combi

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35

Holland, Chase Carlton. "Computational Methods for Estimating Rail Life." Thesis, Virginia Tech, 2012. http://hdl.handle.net/10919/41436.

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In American rail operations, rails fail due to the combined effects of rail wear due to repetitive wheel contact and the growth of surface and sub-surface cracks and flaws. Rail maintenance includes frequent uncoupled wear and ultrasonic inspections that determine the amount of wear that the rail has undergone and the presence of cracks and flaws. A rail is removed from service when its wear reaches a pre-determined wear limit or a flaw is detected in its cross section. In rail research, the life of a rail is typically estimated using fracture mechanic or fatigue methods and an assumed flaw ge

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RADAMPOLA, Senanie Sujeewa, and senanie s. radampola@mainroads qld gov au. "EVALUATION AND MODELLING PERFORMANCE OF CAPPING LAYER IN RAIL TRACK SUBSTRUCTURE." Central Queensland University. Centre for Railway Engineering, 2006. http://library-resources.cqu.edu.au./thesis/adt-QCQU/public/adt-QCQU20060817.115415.

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In the design of rail track structures where the subgrade cannot achieve the desired capacity, enabling the required standard of track geometry to be maintained for the speed, axle load and tonnage to be hauled, a capping layer of granular material is placed between the natural ground or the embankment fill material and the ballast to protect the underlying weaker layers. In spite of the important role played by the capping layer, very little research has been carried out on its performance. The current practice of design of the capping layer, therefore, is based on working stress philosophy w

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Basson, Conrad Charl Peter. "Analysis of defects occuring on rail tracks." Thesis, Cape Peninsula University of Technology, 2018. http://hdl.handle.net/20.500.11838/2752.

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Thesis (Master of Engineering in Mechanical Engineering)--Cape Peninsula University of Technology, 2018.<br>South Africa’s railway system is the most highly developed in Africa. There are different kinds of transport systems in South Africa but rail transport is considered as one of an important element of the country’s transport infrastructure. In South Africa, over 2.4 million passengers make use of rail transport to get them to their destinations. However, evidence shows that train accidents have become a common occurrence across the country. Train-related accidents such as collision, derai

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Dong, K., D. P. Connolly, O. Laghrouche, P. K. Woodward, and Costa P. Alves. "The stiffening of soft soils on railway lines." Elsevier, 2018. https://publish.fid-move.qucosa.de/id/qucosa%3A73234.

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Railway tracks experience elevated rail deflections when the supporting soil is soft and/or the train speed is greater than approximately 50% of the wave propagation velocity in the track-soil system (i.e. the critical velocity). Such vibrations are undesirable, so soil replacement or soil improvement of the natural soil (or alternatively mini-piles or lime-cement treatment) is often used to increase track-ground stiffness prior to line construction. Although areas of existing soft subgrade might be easily identified on a potential new rail route, it is challenging to determine the type and de

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Sevi, Adam F. "Physical modeling of railroad ballast using the parallel gradation scaling technique within the cyclical triaxial framework." Diss., Rolla, Mo. : Missouri University of Science and Technology, 2008. http://scholarsmine.mst.edu/thesis/pdf/Sevi_09007dcc806723a3.pdf.

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Thesis (Ph. D.)--Missouri University of Science and Technology, 2008.<br>Vita. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed June 1, 2009) Includes bibliographical references (p. 117-124).

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Babenko, Pavel. "VISUAL INSPECTION OF RAILROAD TRACKS." Doctoral diss., University of Central Florida, 2009. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4013.

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In this dissertation, we have developed computer vision methods for measurement of rail gauge, and reliable identification and localization of structural defects in railroad tracks. The rail gauge is the distance between the innermost sides of the two parallel steel rails. We have developed two methods for evaluation of rail gauge. These methods were designed for different hardware setups: the first method works with two pairs of unaligned video cameras while the second method works with depth maps generated by paired laser range scanners. We have also developed a method for detection of rail

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Yeung, Ngai-hang Ian. "Sound on track : study of railway noise in Hong Kong /." Hong Kong : University of Hong Kong, 1999. http://sunzi.lib.hku.hk/hkuto/record.jsp?B21301530.

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Moas, Eduardo. "Investigation of the finite element method for computing wheel/rail contact forces in steady curving." Thesis, Virginia Polytechnic Institute and State University, 1987. http://hdl.handle.net/10919/50064.

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The understanding of rail vehicle steady-state and dynamic curving has increased substantially in the last few years. Contemporary curving models include such nonlinear effects as two-point contact, creep force saturation, and rail flexibility. The usual approximation concerning the contact geometry is that the Iocalized wheel and rail curvatures at the center of the contact patch are constant throughout the contact patch. This approximation allows computation of contact stresses using Hertzian theory, and it allows the computation of contact patch forces using one of Kalker’s theories.

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Jo, Jinmyun. "Residual stress measurement in railroad car wheels." Diss., Virginia Polytechnic Institute and State University, 1989. http://hdl.handle.net/10919/54206.

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A new failure criterion for discriminating good and bad (overheated) railroad car wheels is proposed. This criterion can replace the conventional “four inch" discoloration rule. The procedure for the new discrimination criterion is based on the fluctuations of the azimuthal residual stress in the tread of the wheel. This criterion is based on a maximum likelihood statistical analysis of data obtained from six different wheels as deterrmined by x-ray diffraction. Of these locations, the analysis showed the tread, and perhaps a critical point on the top of the flange, to be the most sensitive to

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Yeung, Ngai-hang Ian, and 楊毅恆. "Sound on track: study of railway noise in Hong Kong." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1999. http://hub.hku.hk/bib/B31254457.

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Nagode, Clement Michel Jean. "Electromechanical Suspension-based Energy Harvesting Systems for Railroad Applications." Diss., Virginia Tech, 2013. http://hdl.handle.net/10919/50611.

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Currently, in the railroad industry, the lack of electrical sources in freight cars is a problem that has yet to find practical solutions. Although the locomotive generates electricity to power the traction motors and all the equipment required to operate the train, the electrical power cannot, in a practical manner, be carried out along the length of the train, leaving freight cars unpowered. While this has not been a major issue in the past, there is a strong interest in equipping modern cars with a myriad of devices intended to improve safety, operational efficiency, or health monitoring, u

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Verma, Manish. "Analytical approaches to railroad and rail-truck intermodal transportation of hazardous materials." Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=85961.

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Hazardous Materials are potentially harmful to people and environment due to their toxic ingredients. Although a significant portion of dangerous goods transportation is via railroads, prevailing studies on dangerous goods transport focus on highway shipments. We present an analytical framework that incorporates the differentiating features of trains in the assessment of risk. Each railcar is a potential source of release, and hence risk assessment of trains requires representation of multiple release sources in the model. We report on the use of the proposed approach for the risk asses

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McNamara, John D. "Health monitoring of railroad tracks by elastic-wave based non-destructive testing /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC IP addresses, 2003. http://wwwlib.umi.com/cr/ucsd/fullcit?p3112830.

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48

Cederlund, Harald. "The microbiology of railway tracks : towards a rational use of herbicides on Swedish railways /." Uppsala : Department of Microbiology, Swedish University of Agricultural Sciences, 2006. http://epsilon.slu.se/200644.pdf.

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49

Kim, Hongsin. "Trackside measurement of critical zones in railway tracks." Thesis, University of Birmingham, 2016. http://etheses.bham.ac.uk//id/eprint/6969/.

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Abstract:

Abrupt changes in track stiffness can occur where the ballasted track transitions from soft foundations onto bridges and viaducts, onto hard foundations and into tunnels, or at the interface between bal¬lasted track and slab track. Such interfaces between areas of different track stiff¬ness are defined as critical zones and can cause passenger discomfort, unpredictable track degradation and, potentially, track support failures. Given their nature, main¬taining critical zones is more expensive than maintaining plain line track and measuring and assessing the variations in track stiffness are cr

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50

Heinigk, Penelope Pearl. "The other side of the tracks : representations of gender in early railroad turmoil /." view abstract or download file of text, 2001. http://wwwlib.umi.com/cr/uoregon/fullcit?p3018370.

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Thesis (Ph. D.)--University of Oregon, 2001.<br>Typescript. Includes vita and abstract. Includes bibliographical references (leaves 204-207). Also available for download via the World Wide Web; free to University of Oregon users.

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