scholarly journals Fifty years of urban accessibility: The impact of the urban railway network on the land gradient in Berlin 1890–1936

2011 ◽  
Vol 41 (2) ◽  
pp. 77-88 ◽  
Author(s):  
Gabriel M. Ahlfeldt ◽  
Nicolai Wendland
Keyword(s):  
Railway Network ◽  
Urban Accessibility ◽  
The Impact

scholarly journals Ranking the critical sections of railway networks

2020 ◽  
pp. 095440972092568
Author(s):  
Ratthaphong Meesit ◽  
John Andrews
Keyword(s):  
Network Flow ◽  
Topological Analysis ◽  
Preventive Strategy ◽  
Railway Network ◽  
Macroscopic Models ◽  
Railway Systems ◽  
Railway Networks ◽  
Network Simulation Model ◽  
The Impact ◽  
Critical Sections

Railway systems are now facing an increasing number of threats such as aging infrastructures and climate changes. The identification of critical network sections provides infrastructure managers with the ability to understand the impact of a disruption and creates a suitable preventive strategy to counter such threats. To this end, various vulnerability analysis methods have been proposed for railway networks. Two main types of methods, network topological analysis and network flow-based analysis, have been developed. Both approaches are constructed based on macroscopic models, which take only some railway properties such as network structure, train and passenger flow into account. Thus, the results obtained are high level approximations. This study proposes a new analysis method, which is developed based on the stochastic-microscopic railway network simulation model. The method can be applied to identify the critical sections of a railway network. The effect of impact levels and occurrence times of a disruption on the network section criticality is presented. An application of the proposed model is demonstrated using the Liverpool railway network in the UK.

scholarly journals A Railway Scheduling Method using Probabilistic Model Checking

2019 ◽  
Vol 9 (1) ◽  
pp. 6694-6698
Keyword(s):  
Model Checking ◽  
Probabilistic Model ◽  
Probabilistic Model Checking ◽  
Railway Transportation ◽  
Railway Network ◽  
Double Line ◽  
Arrival Times ◽  
Scheduling Method ◽  
Prism Model ◽  
The Impact

Trains scheduling is an important problem in railway transportation. Many companies use fixed train timetabling to handle this problem. Train delays can affect the pre-defined timetables and postpone destination arrival times. Besides, delay propagation may affect other trains and degrade the performance of a railway network. An optimal timetable minimizes the total propagated delays in a network. In this paper, we propose a new approach to compute the expected propagated delays in a railway network. As the main contribution of the work, we use Discrete-time Markov chains to model a railway network with a fixed timetable and use probabilistic model checking to approximate the expected delays and the probability of reaching destinations with a desired delay. We use PRISM model checker to apply our approach for analyzing the impact of different train scheduling in double line tracks.

scholarly journals Performance analysis of the working surface of the rails from test batches on the Test Loop of JSC “VNIIZhT”

2018 ◽  
Vol 77 (3) ◽  
pp. 141-148
Author(s):  
M. Yu. Khvostik ◽  
I. V. Khromov ◽  
O. A. Bykova ◽  
G. A. Beresten’
Keyword(s):  
Wear Resistance ◽  
Operating Time ◽  
Operating Conditions ◽  
Continuous Change ◽  
Wear Area ◽  
Railway Network ◽  
Operational Conditions ◽  
Rolling Surface ◽  
Test Loop ◽  
The Impact

The monitoring of railway rails damage on the railway network of the JSC “Russian Railways” as well as operational and polygon tests are conducted with the purpose of assessing the impact of operating conditions on the intensity of rails damage, obtaining initial data for forecasting rails failures. The increased intensity of rails wear on sites with a complex plan and profile leads to the fact that with a continuous change from the track, rails which have an underutilized service life of more than 20 % are retrieved. Polygon tests on the Test Loop of the JSC “VNIIZhT” near the Scherbinka station can provide the repeatability and reliability of the results, comparative tests are carried out under identical conditions and their duration is several times less than when tested at experimental sites under operational conditions. The results of the polygon tests of new differentially heat-strengthened rails did not reveal any advantages in the wear resistance of special purposed rails (laid in the recommended radius of the curve for its application) when comparing the rails of domestic manufacturers. Metal shelling out on the rolling surface of rails is the main reason for the removal of rails from test batches. The origin and development of defects of this kind is due to both violations of the technology of manufacturing rails, and because of violations of the current maintenance of the track. The metal stock in the area of the rail head of R65 type due to the increase in its dimensions positively affects the extension of the lifetime of the rails, reducing the cost of the life cycle and the rail itself, and the design of the track as a whole. When carrying out a separate study in order to obtain results characterizing the stability of high-quality rails to contact fatigue damage, it is advisable to optimize the conditions of the polygon tests, bringing them closer to operational ones. When forming the test results, it is necessary to expand the list of criteria for assessing the wear resistance of rails, supplementing it with the size of the wear area at the time of a certain operating time of the tonnage, with the introduction of this criterion into the appropriate methods for the polygon (operational) tests.

scholarly journals Decision-Making Process in the Case of Insufficient Rail Capacity

2020 ◽  
Vol 12 (12) ◽  
pp. 5023
Author(s):  
Anna Dolinayova ◽  
Vladislav Zitricky ◽  
Lenka Cerna
Keyword(s):  
Decision Making ◽  
Network Capacity ◽  
Cost Calculation ◽  
Detailed Calculation ◽  
Railway Transport ◽  
Negative Effects ◽  
Railway Network ◽  
Railway Infrastructure ◽  
Rail Infrastructure ◽  
The Impact

One of the main priorities of transport policy in the EU is to take measures to support railway transport as an environmentally friendly transport mode. An interesting challenge for a railway transport operation is represented with cost items for its operation. This problem is exacerbated if transport flows are routed through a congested railway infrastructure. If some or all transport takes place on congested rail infrastructure, the carrier’s costs increase, which may ultimately lead to withdrawal from the market. The article deals with the impact of insufficient capacity on the rail carrier’s costs. We used a pre-cost calculation methodology to calculate the rail carrier’s additional costs due to the insufficient railway network capacity based on detailed calculation of train costs and proposed a methodology for carrier decision-making in case of insufficient rail infrastructure capacity. The case study showed that the use of a diversion track in case of insufficient planned rail line capacity may not be advantageous for carriers, even with a longer waiting time for capacity to be released. One of the ways to eliminate the negative effects of congested railway infrastructure is investment in the increase of its capacity.

Railway’s Impact on Regional Socio-Economic Systems: Impact Degree Evaluation—A Case Study of Beijing-Shanghai Existing Line

2012 ◽  
Author(s):  
Xuemei Li ◽  
Dandan Liang ◽  
Yaodong Zhou
Keyword(s):  
Principal Component ◽  
Economic Systems ◽  
Data Envelopment ◽  
Future Planning ◽  
Railway Network ◽  
The Third ◽  
Operational Management ◽  
The Impact ◽  
Resource And Environment

This article establishes railway’s impact aggregative indicators by using Correlation Analysis and Principal Component Analysis. With the correlative data of Beijing-Shanghai existing line from 2000 to 2008, the paper evaluates the level of railway’s impact on regional socioeconomic systems through Data Envelopment Analysis (DEA) method. According to the DEA results, it can be divided into three levels: first level is Beijing and Shanghai; second is Tianjin, Jiangsu and Shandong; and the third is Hebei and Anhui. The results of this paper could be used as references for the future planning and operational management of Chinese railway network: (1) Railway’s influence on the starting and end station is stronger than that on the intermediate stations. In view of this, more railways or higher technical railways could be considered to build in the higher impact areas; (2) In order to meet the needs of passenger and freight transport, it’s better to separate passenger and freight lines; (3) Although the overall influence is lower at the middle stations, the impact on the systems of resource and environment is high.

scholarly journals An Integration of Train Timetabling, Platforming and Routing-Based Cooperative Adjustment Methodology for Dealing with Train Delay

2020 ◽  
Vol 30 (07) ◽  
pp. 901-919
Author(s):  
Yinggui Zhang ◽  
Zengru Chen ◽  
Min An ◽  
Aliyu Mani Umar
Keyword(s):  
High Speed ◽  
Railway Network ◽  
High Speed Railway ◽  
Train Timetabling ◽  
Safety Risks ◽  
Train Operation ◽  
Train Operation Adjustment ◽  
And Control ◽  
The Impact

Train delay is a serious issue that can spread rapidly in the railway network leading to further delay of other trains and detention of passengers in stations. However, the current practice in the event of the trail delay usually depends on train dispatcher’s experience, which cannot manage train operation effectively and may have safety risks. The application of intelligent railway monitor and control system can improve train operation management while increasing railway safety. This paper presents a methodology in which train timetabling, platforming and routing models are combined by studying the real-time adjustment and optimization of high-speed railway in the case of the train delay in order to produce a cooperative adjustment algorithm so that the train operation adjustment plan can be obtained. MATLAB computer programs have been developed based on the proposed methodology and adjustment criteria have been established from knowledge data bases in order to calculate optimized solutions. A case study is used to demonstrate the proposed methodology. The results show that the proposed method can quickly adjust the train operation plan in the case of the train delay, restore the normal train operation order, and reduce the impact of train delay on railway network effectively and efficiently.

scholarly journals Examining the Impact of Knowledge Mobilization Strategies to Inform Urban Stakeholders on Accessibility: A Mixed-Methods study

2020 ◽  
Vol 17 (5) ◽  
pp. 1561
Author(s):  
Delphine Labbé ◽  
Atiya Mahmood ◽  
William C. Miller ◽  
W. Ben Mortenson
Keyword(s):  
Mixed Method ◽  
Urban Areas ◽  
People With Disabilities ◽  
Mixed Methods Study ◽  
Mixed Method Study ◽  
Knowledge Mobilization ◽  
Impact Indicators ◽  
Urban Accessibility ◽  
The Impact ◽  
Quantitative And Qualitative Methods

Urban areas offer many opportunities for people with disabilities, but limited accessibility may prevent their full engagement in society. It has been recommended that the experience-based perspective of people with disabilities should be an integral part of the discussion on urban accessibility, complementing other stakeholder expertise to facilitate the design of more inclusive environments. The goals of this mixed-method study were to develop knowledge mobilization (KM) strategies to share experience-based findings on accessibility and evaluate their impact for various urban stakeholders. Using a participatory approach, various KM strategies were developed including videos, a photo exhibit and an interactive game. These strategies were evaluated based on various impact indicators such as reach, usefulness, partnerships and practice changes, using quantitative and qualitative methods. The findings suggested that the KM strategies were effective in raising the awareness of various urban stakeholders and providing information and guidance to urban planning practices related to accessibility.

Heat-Related Failures on Southeast England’s Railway Network: Insights and Implications for Heat Risk Management

2016 ◽  
Vol 8 (2) ◽  
pp. 177-191 ◽  
Author(s):  
Emma Ferranti ◽  
Lee Chapman ◽  
Caroline Lowe ◽  
Steve McCulloch ◽  
David Jaroszweski ◽  
...  
Keyword(s):  
Risk Management ◽  
High Temperatures ◽  
Heat Waves ◽  
Summer Season ◽  
Temporal And Spatial Distribution ◽  
Railway Network ◽  
Railway Infrastructure ◽  
Infrastructure System ◽  
Heat Risk ◽  
The Impact

Abstract High temperatures and heat waves can cause numerous problems for railway infrastructure, such as track buckling, sagging of overhead lines, and the failure of electrical equipment. Without adaptation, these problems are set to increase in a future warmer climate. This study used industry fault data to examine the temporal and spatial distribution of heat-related incidents in southeast England and produce a unique evidence base of the impact of temperature on the rail network. In particular, the analysis explored the concept of failure harvesting, whereby the infrastructure system becomes increasingly resilient to temperature over the course of the summer season (April–September) as the most vulnerable assets fail with each incremental rise in temperature. The analysis supports the hypothesis and clearly shows that a greater number of heat-related incidents occur in the early/midsummer season before reducing significantly, despite equivalently high temperatures. This failure harvesting and the consequential increased resilience of the railway infrastructure system over the course of the summer season could permit an innovative and dynamic new approach to heat risk management on the railway network. New approaches that would reduce the disruption and delays and improve service are explored here.

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