Railway Transportation Systems

Pyrgidis, Christos

doi:10.1201/b19472

Cited by 45 publications

(14 citation statements)

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“…Modern tramways are mass public transport systems in urban and suburban areas characterised by commercial speeds of 12*30 km/h and actual passenger capacity of the order of 6000 passengers/h/per direction. They can be classified as follows [6,7]: The most distinctive functional and geometric characteristics based on the type system are given in Table 1.…”

Section: Classification Of Tramway Systemsmentioning

confidence: 99%

“…The areas with massive pedestrian flows can be regulated Fig. 4 Horizontal and vertical sign systems-Barcelona Spain [7] by preventing vehicles from turning into side streets; this can be feasible, for instance, near schools or public buildings.…”

Section: Accidents Involving Pedestriansmentioning

confidence: 99%

“…Road carriageway near an intersection with a tramway line (Spain)[7] Vertical no-turn signs. Trams in Barcelona and Valencia[7] …”

mentioning

confidence: 99%

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Tramways in Urban Areas: An Overview on Safety at Road Intersections

Guerrieri

2018

Urban Rail Transit

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Although the accident number involving trams is comparatively very limited to the total road accident number, the consequences of tram crashes are very serious, especially when pedestrians are run over. The new power supply technologies (e.g. catenary-free systems) allow to build tram networks, even in old town centres and pedestrian areas, with additional increased risk of pedestrian casualties. This will require specific design solutions and traffic regulations for road safety as described in this paper, with particular regard to vulnerable users (i.e. pedestrians and cyclists), especially near intersections and pedestrian crossings. Therefore, the research analyses the road accident rate and its evolution in the last 10 years with specific focus on Italian tramways. The main risk conditions and the strategies used worldwide to improve the safety of tramway system in the urban context are described. The main countermeasures to reduce accident risks are aimed at better warning road users of specific risk conditions. Other countermeasures are designed to install suitable facilities on road platforms for better informing users of tramway system, for limiting or temporarily prohibiting turning movements or manoeuvrings and for properly channelling pedestrian and vehicle flows with the purpose to avoid or reduce interference with trams.

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Section: Classification Of Tramway Systemsmentioning

confidence: 99%

Section: Accidents Involving Pedestriansmentioning

confidence: 99%

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Tramways in Urban Areas: An Overview on Safety at Road Intersections

Guerrieri

2018

Urban Rail Transit

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“…Secondly, the track panel is comprised of sleepers, rails, and fastenings. The processes of the track panel consist of the track panel installing, ballast tamping, leveling, and surfacing [3]. As the ballast track construction consists of many processes, it is required to use heavy diesel equipment (truck, excavator, grader, compactor, rail-loader, tamper, regulator, and stabilizer etc.)…”

Section: Introductionmentioning

confidence: 99%

Development of Simulation Model for Estimating Gas Emissions From Equipment in Railway Construction Processes

Jewbunchu¹

2018

GEOMATE

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ABSTRACT:The railway construction utilizes several pieces of heavy equipment resulting in exhaust emissions such as pollution and greenhouse gas emissions (GHG). The release of emissions can affect the environment and human health. Although many previous studies have attempted to approximately estimate the amount of emissions, they did not consider the detailed processes of construction. The simulation model can be applied to improve this limitation and provides the ability to allocate resources and optimize the construction process. In addition, it can help to analyze alternative approaches to reduce emissions. This paper presents the development of simulation model to analyze the amount of exhaust emissions from the equipment usage in railway construction. It compares the amount of exhaust emissions from the situation in the railway construction process, which will demonstrate the effects on the relationship between the amount of exhaust emissions and the construction approach. As a result, this research provides an alternative method to manage exhaust emissions from the railway construction process and resource management.

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“…The traditional structure of a railway track-bed consists of several components grouped into (i) the superstructure and (ii) the substructure. Ballast and subballast layers are considered to be part of the superstructure (Giese et al, 1925;Tzanakakis, 2013;Pyrgidis, 2016) rather than the substructure (Indraratna, 2016;Li et al, 2016), and this classification may vary depending on the engineering discipline. In any case, the ballast layer is acknowledged to play a role of paramount importance to guarantee the safety and the highest standard of operability to the railway traffic .…”

Section: Introductionmentioning

confidence: 99%

A Computer‐Aided Model for the Simulation of Railway Ballast by Random Sequential Adsorption Process

Benedetto

Ciampoli

Brancadoro

et al. 2017

Computer aided Civil Eng

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This article presents a computer‐aided multistage methodology for the simulation of railway ballasts using the Random Sequential Adsorption (RSA – 2D domain) paradigm. The primary stage in this endeavor is the numerical generation of a synthetic sample by a “particle sizing and positioning” process followed by a “compaction” process. The synthetic samples of ballast are then visualized in the Computer‐Aided Design (CAD) environment. The outcomes of the simulation are analyzed by comparison with the results of an experimental investigation carried out using a methacrylate container in which real samples of railway ballast are formed. A test of model reliability is carried out between the aggregates number and the grading curves of the synthetic sample and the real one. A validation is therefore performed using the ground‐penetrating radar (GPR) nondestructive testing (NDT) method and the finite‐difference time‐domain (FDTD) simulation developed in a computer‐aided environment. The results prove the viability and the applicability of the proposed modeling for the assessment of railway ballast conditions.

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Railway Transportation Systems

Cited by 45 publications

References 0 publications

Tramways in Urban Areas: An Overview on Safety at Road Intersections

Tramways in Urban Areas: An Overview on Safety at Road Intersections

Development of Simulation Model for Estimating Gas Emissions From Equipment in Railway Construction Processes

A Computer‐Aided Model for the Simulation of Railway Ballast by Random Sequential Adsorption Process

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