Improvement of railway performance: a study of Swedish railway infrastructure

Al-Douri, Yamur K.; Tretten, Phillip; Karim, Ramin

doi:10.1007/s40534-015-0092-0

Cited by 45 publications

(28 citation statements)

References 18 publications

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“…In [8,35] they correctly state that measurements of track irregularities are based on the assumption that the curvature of the track can be determined by versines. Increased railway traffic leads to the rapid degradation of railway tracks [24], which significantly affects quality, comfort, and safety. The state of a curvilinear section's (the actual circular curve condition with transition curves) geometry is particularly important, especially for tracks in operation, and requires the use of universal and optimal measuring instruments: the solution of this problem is the MMS.…”

Section: Discussionmentioning

confidence: 99%

“…Al-Douri et al in [24] confirmed that increased traffic has led to an increased rate of degradation of the railway track, which has resulted in higher maintenance costs. Degradation affects comfort, safety, and track quality, as well as reliability, availability, speed, and overall railway performance.…”

Section: Introductionmentioning

confidence: 99%

“…Degradation affects comfort, safety, and track quality, as well as reliability, availability, speed, and overall railway performance. By implementing a long-term maintenance strategy and conducting preventive maintenance actions, maintenance costs can be reduced [24]. In addition to that, problems with measured data, missing data, and incorrect location data have resulted in increased and unnecessary maintenance tasks.…”

Section: Introductionmentioning

confidence: 99%

“…In addition to that, problems with measured data, missing data, and incorrect location data have resulted in increased and unnecessary maintenance tasks. The conclusions in [24] show that proactive solutions are needed to reach the desired goals of improved safety, improved availability, and improved reliability. Chiacchiari and Loprencipe in [25] concluded that rail irregularities, particularly those in urban railway infrastructures, are one of the main causes of noise and vibration generation.…”

Section: Introductionmentioning

confidence: 99%

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Magnetic-Measuring Square in the Measurement of the Circular Curve of Rail Transport Tracks

Kampczyk

2020

Sensors

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In rail transport, measuring the actual condition of a circular curve of a railway track is a key element of track position monitoring not only during operation but also during final works. Predicting changes in its position in the horizontal plane is one of the most important related scientific issues. This paper presents the results of measurements performed with an innovative measuring device called the Magnetic-Measuring Square (MMS). The aim of the research was to demonstrate the acceptability of using the MMS. Horizontal versines of a rail track curve were measured as three neighboring points on a curve (using the method of lacing/stringlining, also called the three-point or the Hallade method), and the perpendicularity of rail joints and shortenings were measured. The MMS device presented in this article was used to measure versines and differences in rails lengths (rail shortenings in the curve) in the operating mode involving a laser distance meter with a laser beam (laser power P < 1 mW, laser wavelength λ = 635 nm) with a target cross, a camera, and a surveying measuring disk. The measurement results confirmed that it is possible to employ the MMS to monitor the geometry of railway track fragments such as track transition curves and railway track curves in rail transport.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Magnetic-Measuring Square in the Measurement of the Circular Curve of Rail Transport Tracks

Kampczyk

2020

Sensors

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“…Lost Customer Hours (LCH) within a rail service context]. Rail infrastructure appears to be moving from reactive models of asset maintenance to more 'predict-and-prevent' models where intelligent systems are embedded within the complex socio-technical transport network (Al-Douri et al 2016;Zoeteman 2001Zoeteman , 2006Bousdekis et al 2015;Moore and Starr 2006). Such intelligent infrastructure incorporates the use of remote sensors that provide condition-based maintenance approaches whereby the sensors attached to the assets track asset health data continuously (Bousdekis et al 2015;Campos 2009;Garcí et al 2003;Wang et al 2007).…”

Section: Maintenance Models and Frameworkmentioning

confidence: 99%

Identifying rail asset maintenance processes: a human-centric and sensemaking approach

2018

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Efficient asset maintenance is key for delivering services such as transport. Current rail maintenance processes have been mostly reactive with a recent shift towards exploring proactive modes. The introduction of new ubiquitous technologies and advanced data analytics facilitates the embedding of a 'predict-and-prevent' approach to managing assets. Successful, user-centred integration of such technology is still, however, a sparsely understood area. This study reports results from a set of interviews, based on critical decision method, with rail asset maintenance and management experts regarding current procedural aspects of asset management and maintenance. We analyse and present the results from a human-centric sensemaking timeline perspective. We found that within a complex socio-technical environment such as rail transport, asset maintenance processes apply not only just at local levels, but also at broader, strategic levels that involve different stakeholders and necessitate different levels of expertise. This is a particularly interesting aspect within maintenance that has not been discussed as of yet within a process-based and timeline-based models of asset maintenance. We argue that it is important to consider asset maintenance activities within both micro (local)-and macro (broader)-levels to ensure reliability and stability in transport services. We also propose that the traditionally distinct notions of individual, collaborative and artefact-based sensemaking are in fact all in evidence in this sensemaking context, and argue that a more holistic view of sensemaking is therefore appropriate by placing these results within an amended recognition-primed decision-making model.

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Distributed Chance-Constrained Model Predictive Control for Condition-Based Maintenance Planning for Railway Infrastructures

Jamshidi

Núñez

et al. 2019

Predictive Maintenance in Dynamic Systems

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Maintenance is essential for the reliability, availability, and safety of a railway network, which is composed of various infrastructures like tracks, tunnels, stations, switches, overhead wiring, signaling systems, and safety control systems. In this paper we focus on track maintenance, which in general takes up a large portion of the annual maintenance budget of a railway infrastructure network, e.g., 40% for the Dutch railway network [1]. As shown in Fig. 1, a railway track contains different assets, e.g., rails, ballasts, sleepers, fastenings, welds, etc., that are interconnected and work together. These assets suffer from quality degradation over time due to regular usage. For example, the contact between wheel and rail leads to squats, a typical rolling contact fatigue that first appears on the rail surface and might cause rail breakage if not treated properly [2]. Early-stage squats can be effectively treated by grinding, while late-stage squats can only be addressed by rail replacement [3]. Due to the high cost of railway track maintenance interventions (e.g., over EUR 10,000 for one grinding operation), and the limited resource for track maintenance (e.g., limited track possession time for maintenance), how to plan maintenance interventions in a cost-efficient way without sacrificing the safety and reliability of the whole network has become a primary concern for railway infrastructure managers. This explains why most European countries have started a shift from reactive maintenance to proactive maintenance in recent years [4, 5]. Conditionbased maintenance [6, 7], where maintenance interventions are planned based on

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Improvement of railway performance: a study of Swedish railway infrastructure

Cited by 45 publications

References 18 publications

Magnetic-Measuring Square in the Measurement of the Circular Curve of Rail Transport Tracks

Magnetic-Measuring Square in the Measurement of the Circular Curve of Rail Transport Tracks

Identifying rail asset maintenance processes: a human-centric and sensemaking approach

Distributed Chance-Constrained Model Predictive Control for Condition-Based Maintenance Planning for Railway Infrastructures

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