Corrosion Control of Modern Light Rail Transit (LRT) Systems

2017 ◽  
Author(s):  
Michael Berman ◽  
Quentin P. Williams
Keyword(s):  
United States ◽  
The United States ◽  
Control Measures ◽  
Light Rail ◽  
Rail Transit ◽  
National Bureau ◽  
Light Rail Transit ◽  
Corrosion Control ◽  
Transit System ◽  
Transit Systems

Since the introduction of electrified transit systems in the United States there has been a number of advancements in the field of corrosion control related to light rail transit (LRT) systems. Modern day direct current (dc) powered LRT systems have been designed with a variety of corrosion control features built-in. Most of the research into corrosion control and the mitigation of stray currents known as electrolysis in the early days of electrified transit systems first appeared extensively in papers prepared and presented by personnel of the National Bureau of Standards. This research has led to better protection against corrosion of transit systems and nearby structures throughout the years. Due to the ever increasing number of transit systems being built or upgraded, it’s essential to incorporate the installation, testing and monitoring of corrosion control measures in these transit systems. By integrating these corrosion control features into the design of LRT systems and subsystems, it will help to prevent premature corrosion failures on LRT fixed facilities and other structures. This paper identifies the main causes of corrosion and how corrosion control can be implemented into the design of LRT systems to prevent damage to the transit system and other structures.

scholarly journals The Color of Health: Residential Segregation, Light Rail Transit Developments, and Gentrification in the United States

2019 ◽  
Vol 16 (19) ◽  
pp. 3683 ◽  
Author(s):  
Shadi O. Tehrani ◽  
Shuling J. Wu ◽  
Jennifer D. Roberts
Keyword(s):  
United States ◽  
Residential Segregation ◽  
Low Income ◽  
Traffic Congestion ◽  
The United States ◽  
Careful Consideration ◽  
Light Rail ◽  
Rail Transit ◽  
Light Rail Transit ◽  
Transit Oriented Development

As the modern urban–suburban context becomes increasingly problematic with traffic congestion, air pollution, and increased cost of living, city planners are turning their attention to transit-oriented development as a strategy to promote healthy communities. Transit-oriented developments bring valuable resources and improvements in infrastructure, but they also may be reinforcing decades-old processes of residential segregation, gentrification, and displacement of low-income residents and communities of color. Careful consideration of zoning, neighborhood design, and affordability is vital to mitigating the impacts of transit-induced gentrification, a socioeconomic by-product of transit-oriented development whereby the provision of transit service “upscales” nearby neighborhood(s) and displaces existing community members with more affluent and often White residents. To date, the available research and, thus, overall understanding of transit-induced gentrification and the related social determinants of health are limited and mixed. In this review, an overview of racial residential segregation, light rail transit developments, and gentrification in the United States has been provided. Implications for future transit-oriented developments are also presented along with a discussion of possible solutions.

Light rail transit in the United States

1980 ◽  
Vol 9 (1) ◽  
pp. 67-74
Author(s):  
Stewart F. Taylor
Keyword(s):  
United States ◽  
The United States ◽  
Light Rail ◽  
Rail Transit ◽  
Light Rail Transit

Privatisation of fixed-rail transit systems: a case study of Malaysia's STAR and PUTRA

2006 ◽  
Vol 33 (7) ◽  
pp. 846-853 ◽  
Author(s):  
Abdul-Rashid Abdul-Aziz
Keyword(s):  
Capital City ◽  
Light Rail ◽  
Rail Transit ◽  
Light Rail Transit ◽  
Kuala Lumpur ◽  
Transit System ◽  
Transit Systems ◽  
The Public ◽  
Privatisation Programme

Since the early 1980s, many public utilities have been privatised under Malaysia's privatisation programme. A few, however, have since prematurely returned to government hands, among them the two light-rail transit systems in the capital city of Kuala Lumpur, STAR and PUTRA. This paper chronicles the pre- and post-privatisation events of both facilities before attempting to provide rational explanation behind their untimely surrender to the public domain. Based on publicly available material, this paper argues that neither the quality of government negotiators nor the length of time devoted to negotiating could be attributed to the bailout. Nor is there hint that political favouritism and corruption were at play. More than likely, despite the copious incentives provided to the two concession companies, the two projects proved financially unviable.Key words: build–operate–transfer (BOT), Malaysia, privatisation, light-rail transit system.

Harmonic Analysis and Filter Design for the Light Rail Transit Systems

2013 ◽  
Vol 479-480 ◽  
pp. 210-214
Author(s):  
Cheng Ting Hsu ◽  
Hung Ming Huang ◽  
Tsun Jen Cheng ◽  
Lian Jou Tsai
Keyword(s):  
Harmonic Analysis ◽  
Distribution System ◽  
Filter Design ◽  
Harmonic Distortion ◽  
Dynamic Responses ◽  
Light Rail ◽  
Rail Transit ◽  
Light Rail Transit ◽  
Transit System ◽  
Transit Systems

This paper presents the light rail transit system (lrts) impact on the harmonic pollution of distribution feeder. To investigate the dynamic responses of the system voltage and current, the distribution system and lrts models are set up well by using the Alternative Transients Program (ATP). The harmonic analysis of the distribution system with the lrts is executed under various operation scenarios. The 6-pulses and 12-pulses rectifier are adopted for the lrts with a direct current (dc) power supply to the trams. Furthermore, the well-designed filters have also applied to improve the harmonic distortion resulted from the lrts.

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