scholarly journals Key Safety Approaches in Bangladesh Railway

2021 ◽  
Vol 12 (1) ◽  
pp. 57-62
Author(s):  
Hasib Mohammed Ahsan
Keyword(s):  
Transportation System ◽  
Engineering Science ◽  
Railway Network ◽  
Rail Track ◽  
Railway Safety ◽  
Accident Data

Bangladesh Railways (BR) is an integral part of the country's transportation system since the British era. At present it covers a length of 2,877 route kilometres. Train accident data collected from BR revealed that train accidents reduced from 590 per year for 2001-10, to 250 per year for 2010-2015 and to 166 for 2015-16. Data also shows that derailments are the major concern in railway safety. Mixed railway gauges, rail weight, battered and damaged rails, low sleeper density and damaged sleepers, lack of maintenance of fittings and fastenings, and inadequate amount of ballasts are the main reasons for such derailments. So as a safety approach against derailments BR has taken rail track rehabilitation projects as well as speed restriction programs. 2015-16 data showed benefit of such restriction program. A speed map is prepared according to the speed restriction program and speed capacity of different sections of the railway network. Journal of Engineering Science 12(1), 2021, 57-62

scholarly journals Ensuring railway safety on a national scale: national and international experience

2021 ◽  
pp. 60-65
Author(s):  
A. A. Bychkova
Keyword(s):  
International Experience ◽  
Transport Sector ◽  
Analysis Method ◽  
Railway Transport ◽  
Situation Analysis ◽  
National Scale ◽  
Foreign Countries ◽  
Railway Safety ◽  
Scenario Modelling ◽  
Accident Data

The article considers the main measures to create safety conditions in railway transport in foreign countries and compares them with the methods of safety provision by the domestic carrier JSC “Russian Railways”. It is noted that today Russia has its own practices for maintaining a level of security, but that alternative foreign approaches would improve the level of protection. The author analyses accident data and proposes additional measures to reduce the number of accidents. Scenario modelling and the integrated situation analysis method have been proposed as a method for selecting measures to ensure safety and improve the situation in the railway transport sector.

scholarly journals Sizing Algorithm for a Photovoltaic System along an Urban Railway Network towards Net Zero Emission

2021 ◽  
Vol 2021 ◽  
pp. 1-17
Author(s):  
Prabath J. Binduhewa
Keyword(s):  
Transportation System ◽  
Photovoltaic System ◽  
System Capacity ◽  
Weather Data ◽  
Photovoltaic Systems ◽  
Rail Transportation ◽  
Railway Network ◽  
Net Zero ◽  
Capacity Sizing ◽  
Zero Emission

A reliable transportation system is essential for the development of a community. Especially in urban transportation, rail transportation is a faster, more comfortable way to travel for the commuters. These benefits can be valued further when the rail transportation system is with zero emissions. Electric trains can be considered a zero-emission transportation method. However, a rail transportation system operates with net-zero emissions when electricity is generated from zero-emission-based sources. Photovoltaic systems have already been integrated into railway stations and spare land owned by railways to achieve net-zero emissions. Furthermore, medium-voltage DC network and microgrid concepts have been proposed to incorporate more renewable energy sources into railway electrification systems. However, the energy generated from those systems is not enough to realise net-zero emissions, as the power requirements of an urban railway electrification system are high. Accordingly, this article investigates the possibility of implementing a photovoltaic system along the railway tracks to meet the energy demands of an urban railway electrification system so that net-zero emissions can be achieved. Other significant advantages of the proposed photovoltaic system are lower feeder losses due to distributed photovoltaic systems integrated into the railway electrification system, lower conversion losses due to the direct integration of the photovoltaic system into the railway electrification system, and the nonrequirement of additional space to install the photovoltaic system. In this paper, a photovoltaic system capacity sizing algorithm is proposed and presented by considering a railway electrification system, the daily schedule of trains, and historical photovoltaic weather data. This proposed photovoltaic system capacity sizing algorithm was evaluated considering a section of the urban railway network of Sri Lanka and a three-year, 2017-2020, photovoltaic weather data. The results indicated that the potential for photovoltaic generation by installing photovoltaic systems along a railway track is much higher than the requirement, and it is possible to meet the required train scheduling options with proper sizing. Furthermore, in the three-year analysis, it is possible to achieve 90% of the energy required for the railway electrification system with effective train scheduling methods.

Importance of Railway Intelligent Transportation Systems and Architectural Design Issues of Indian Railway Network Scenario

2011 ◽  
Author(s):  
Navin Kumar ◽  
Deepak Ashwani ◽  
Nidhu Kumari
Keyword(s):  
Intelligent Transportation System ◽  
Intelligent System ◽  
Rapid Development ◽  
Intelligent Transportation ◽  
Transportation System ◽  
Transportation Systems ◽  
Design Issues ◽  
Railway Transportation ◽  
Railway Network ◽  
Indian Railway

The railway system, one of the backbones of transportation systems in many countries is becoming more and more complex. It plays increasingly significant role in economic development of the country. Therefore, it becomes necessary to ensure that it operates effectively, efficiently and safely. To achieve that railway industries have to move from old traditional manual work, mechanization and electronic usage to intelligent transportation system (ITS). The transformation of railway transportation to railway intelligent transportation system (RITS) can be a core stratagem to keep and improve the competivity from other modes of transportation. Rapid development of emerging technologies such as communication and computing, intelligent system, technological development of railway industries along with 36,000 kilometers (kms) of laid optical fiber cable make it feasible for Indian Railway (IR) to develop and design RITS. This new generation of railway transportation with higher speed, higher performance and zero tolerance for safety may be able to meet the challenges beyond IR vision 2020. The use of RITS architecture encourages structured development and integration of ITS systems that leads to maximization of benefits by minimizing redundancies and maximizing capabilities. This paper presents a distributed framework for a multi-layered RITS architecture that can be designed for integrating generated information. It also addresses the design issues and challenges in the IR scenario.

Extending Older Drivers’ Access to Freeways with Intelligent Transportation System Technologies

2005 ◽  
Vol 1924 (1) ◽  
pp. 19-27
Author(s):  
Mary Kihl
Keyword(s):  
Intelligent Transportation System ◽  
Baby Boom ◽  
Positive Contrast ◽  
Intelligent Transportation ◽  
Transportation System ◽  
Older Drivers ◽  
Value Drivers ◽  
Variable Message Signs ◽  
Accident Data ◽  
Message Signs

The vanguard of the baby boom generation is approaching retirement age. They received their driver's licenses at the age of 16 at a time when freeways were reshaping urban land patterns. For those living in suburbs and the urban edge, freeway driving is a way of life. Nevertheless, as these drivers age, they too will experience changes in visual acuity and a reduction in their ability to respond quickly to changes in road conditions. Many studies document problems that older drivers face on city streets. The current study funded by the Arizona Department of Transportation and FHWA suggests that freeway driving might be less taxing for some. The study explores the possibility that intelligent transportation system (ITS) devices–-including variable message signs; portable, changeable message signs; and ramp meters–-may respond to older drivers’ challenges with freeway driving. Eleven focus groups held with diverse groups of freeway drivers from 65 to 80 years of age in 2003–2004 focused on these ITS devices and suggested minor changes in application that would enhance their value. Drivers said that fixed variable message signs with a positive contrast caught their attention and were easier to read than standard signs. They urged their use for short simple messages centered on the signs. Portable signs attracted attention, but they were subject to glare and were difficult to read at the roadside, particularly those with multiple phases. Ramp meters were enthusiastically endorsed especially when combined with acceleration lanes. A parallel study using Arizona accident data provided some statistical evidence to support positive views of ramp meters.

Rail Network Planning Study in Shandong Province Based on Integrated Transportation System

2013 ◽  
Vol 361-363 ◽  
pp. 1941-1945
Author(s):  
Yun Xia Xie ◽  
Ru Hua Zhang ◽  
Jin Ping Wang
Keyword(s):  
Transport System ◽  
Network Planning ◽  
Transportation System ◽  
Shandong Province ◽  
Railway Network ◽  
Healthy Development ◽  
Rail Network ◽  
Railway Planning ◽  
The Status ◽  
The Impact

To build a comprehensive transportation system is an important measure to promote rapid and healthy development of the field of transportation. How to prepare railway network planning become an urgent problem, under the background of pursuing the integrated transport concept. Previous studies focus on the single transportation modes, to conduct railway planning. This paper first defines the overall transportation system, then studies the impact of integrated transport system to railway planning, and analyzes the Influencing factors, finally, makes railway network planning of Shandong province as an examples. This instance analyzes the problem of the Status quo railway, then introduces the integrated transport planning channels in Shandong Province, and proposes strategies under the influence of the concept of an integrated transport system, at last divides the railway network channels and plans the railway network in Shandong Province .

scholarly journals Railway Sidings as an Important Part of the Railway Freight Transport Competitiveness as Well as the Realization of the Sustainable Transport Development Policy in Poland

2019 ◽  
Vol 81 ◽  
pp. 71-79
Author(s):  
Arkadiusz Drewnowski
Keyword(s):  
Development Policy ◽  
Transportation System ◽  
Freight Transport ◽  
Natural Source ◽  
Legal Regulations ◽  
Sustainable Transport ◽  
Railway Network ◽  
Railway Freight ◽  
Operating Points ◽  
Railway Freight Transport

The railway sidings handled by the freight transport are primordial operating points in relation to the freight transport as a whole. Every active railway siding constitutes a natural source for creation of a flow of loaded wagons where, in consequence, the transport becomes more frequent on the railway network and rare on the car one. The handled railway sidings influence the realization of the principles of the sustainable transport development policy. The number of the operated railway sidings measure, at the same time, the competitiveness of this transport branch in the Polish transportation system. In the article, the legal regulations, the current situation as well as the issues in relation to the functioning of the railway sidings in Poland are exposed. The propositions to make the railway sidings participate actively in Polish railway freight transport are also listed. They are particularly significant for the national transportation system.

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