نتایج جستجو برای: railroad bridge

تعداد نتایج: 54852  

2013
Ian Savage

This paper discusses the safety challenges faced by railroads in the United States. It discusses and evaluates public policy dealing with trespassing, grade crossing collisions, occupational injuries and operational accidents. The primary conclusion is that the government oversight body, the Federal Railroad Administration (FRA), should take on the role of teacher and risk analyst rather than t...

2011
Jack M Elkin

T H E P R O M I N E N C E given i n recent months to pro posals for the establishment of a comprehensive system of d isabi l i ty insurance emphasizes the distinction i n t h a t respect between the Rai l road Retirement A c t and old ago and survivors insurance under the Social Security A c t . W h i l e bo th provide protection to workers who w i t h d r a w permanently from the labor m a r k...

2009
Hong Jin Cynthia Barnhart Joseph Sussman

On major domestic railroads, a typical general merchandise shipment, or commodity, may pass through many classification yards on its route from origin to destination. At these yards, the incoming traffic, which may consist of several shipments, is reclassified (sorted and grouped together) to be placed on outgoing trains. On average, each reclassification results in an one day delay for the shi...

2009
PAVEL BABENKO

In this dissertation, we have developed computer vision methods for measurement of rail gauge, and reliable identification and localization of structural defects in railroad tracks. The rail gauge is the distance between the innermost sides of the two parallel steel rails. We have developed two methods for evaluation of rail gauge. These methods were designed for different hardware setups: the ...

Journal: :International journal of engineering technology and management sciences 2023

The mini-project work undertaken by us involves the design & development of an automatic railway gate control and alarm system using Arduino. It has been noticed that a lot fatalities lives occur everyday due to manually operated rail gates. These happen mainly at places where road passes through city, locality or unmanned gates crossing zones. Currently, gatemen operate on assumption train...

2013
Francisco Calvo Juan de Oña Andrew Nash

A pricing methodology adapted to specific railroad infrastructures and the trains that use them is one way to ensure that railroad networks used by several different operators are used optimally. The diversity of railway networks (new lines and old lines) and services (long-distance and suburban passenger trains, freight trains, etc.) make it difficult to develop such a pricing methodology. Thi...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علم و صنعت ایران - دانشکده معماری و شهرسازی 1385

حمل و نقل در همه زمانها نقش بنیادین در توسعه اقتصادی و صنعتی جوامع داشتهاست. به موقع رساندن مواد خام به مراکز صنعتی و کشاورزی موجب تحرک دایمی چرخهای تولید می شود و حمل محصولات تولید شده به بازارهای مصرفی داخلی و خارجی و ادامه این فعالیت یعنی نزدیک کردن واتصال حلقه های کارخانجات تولیدی و مراکز مصرف رونق اقتصادی را به دنبال دارد بر پایه تفکر راه آهن به عاملی اساسی در فرایند توسعه پایدار در هر کشو...

Journal: :University of Pennsylvania Law Review and American Law Register 1929

Journal: :The Iowa Review 1996

Journal: :JAMA: The Journal of the American Medical Association 1889

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