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    <title>Transport Research International Documentation (TRID)</title>
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    <copyright>Copyright © 2026. National Academy of Sciences. All rights reserved.</copyright>
    <docs>http://blogs.law.harvard.edu/tech/rss</docs>
    <managingEditor>tris-trb@nas.edu (Bill McLeod)</managingEditor>
    <webMaster>tris-trb@nas.edu (Bill McLeod)</webMaster>
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      <title>Transport Research International Documentation (TRID)</title>
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    <item>
      <title>A COMPUTER FOR YOUR OLD HUMP YARD?</title>
      <link>https://trid.trb.org/View/210572</link>
      <description><![CDATA[In 1977 Southern Railway decided to replace an old and hard-to-maintain hump control computer with a new control computer system.  The new system was developed entirely by Southern Railway employees.  Functions of the new system exceeded those of the old, allowing Southern to eliminate two 24-hr positions.  System installation was done in phases at Brosnan Yard, Macon, Georgia; the final phase was completed in September 1980.]]></description>
      <pubDate>Wed, 30 Jan 1985 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/210572</guid>
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      <title>TRIM SIMULATION OF CANADIAN NATIONAL RAILWAYS' THORNTON YARD</title>
      <link>https://trid.trb.org/View/210576</link>
      <description><![CDATA[The Canadian National Railways terminal interactive model (TRIM) was used to simulate five selected design alternatives to choose the best design for Thornton Yard. Cost estimates were developed for each design, ecological and property impacts were assesed, and interference with existing operations during construction was determined. The first set of simulations reduced the five alternatives to three--two flat-yard designs and one hump-yard design. Further simulation resulted in the selection of one of the flat-yard designs.  Additional simulations were run to fine tune the design selected.]]></description>
      <pubDate>Wed, 30 Jan 1985 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/210576</guid>
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      <title>ENGINEERING DESIGN AND OPERATIONAL STUDY OF COYOTEPEC YARD</title>
      <link>https://trid.trb.org/View/210577</link>
      <description><![CDATA[Coyotepec Yard, near Mexico city, is being designed to handle 6,000 cars on a peak day.  The basic design and the results of computer evaluation studies are presented. Topics addressed include trim-end design; capacity of the yard; humping rate; size of receiving, classification, and departure yards; and number of inspection and yard engine crews.]]></description>
      <pubDate>Wed, 30 Jan 1985 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/210577</guid>
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      <title>RAILROAD CLASSIFICATION YARD TECHNOLOGY MANUAL--VOLUME I: YARD DESIGN METHODS</title>
      <link>https://trid.trb.org/View/169459</link>
      <description><![CDATA[This volume (Volume I) documents the procedures and methods associated with the design of railroad classification yards. Subjects include: site location, economic analysis, yard capacity analysis, design of flat yards, overall configuration of hump yards, hump yard track and switch layout, hump profile design, and hump trim-end design. Volume II is concerned with the design and specification of the yard computer systems, i.e., yard inventory and process control computer systems.]]></description>
      <pubDate>Sat, 15 Aug 1981 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/169459</guid>
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    <item>
      <title>THE PROBLEM OF ORGANISING TWO-WAY SHUNTING IN MARSHALLING YARDS</title>
      <link>https://trid.trb.org/View/161373</link>
      <description><![CDATA[The productivity of marshalling yards with a single set of tracks and automated gravity shunting installations may -- according to theoretical studies -- be improved by two-way shunting.  However the improvement in operations is limited by the problem of crossing traffic.  A study shows that by means of pre-selection of the crossing traffic and corresponding constructional layout of the whole yard, two-way shunting can be practiced to increase productivity.]]></description>
      <pubDate>Fri, 06 Feb 1981 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/161373</guid>
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    <item>
      <title>RAILROAD TECHNOLOGY: CLASSIFICATION YARDS</title>
      <link>https://trid.trb.org/View/160611</link>
      <description><![CDATA[Series of three articles includes: Outlook: Fewer yards, faster output; Queensgate quickens the pace in Cincinnati; Alyth: remodeling a model yard.  First article discusses and discards the possibility of new yards differing significantly from arrangements now in use in North America and then examines the technical advances possible within the framework of the classic yard layout.  It is seen inevitable, and confirmed by suppliers, that there will be fewer yards of any type and this will result only partially from the current merger movement.  There could also be more potential in upgrading existing facilities rather than constructing all-new ones.  Two approaches to the classic hump yard are then subjects of following articles: Construction of a new Chessie System yard in Cincinnati and the improvement possible in a pioneer automated facility of Canadian Pacific in Alberta.]]></description>
      <pubDate>Fri, 06 Feb 1981 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/160611</guid>
    </item>
    <item>
      <title>WAYS OF INTENSIFYING CLASSIFICATION YARD OPERATION</title>
      <link>https://trid.trb.org/View/160763</link>
      <description><![CDATA[The paper deals with the solution of problems involved in assessing the effectiveness of the known (traditional) ways of increasing the handling capacity of the facilities of major classification yards and treats new methods of intensifying their operation.  Authors have considered the track layouts constructional solutions and the technology of operation proposed by them for the introduction of additional technological lines for the purpose of organising the parallel humping of trains, improvement in the technology of partial processing of through trains and so on. The high effectiveness of employing new methods of intensification of classification yard operation was confirmed.]]></description>
      <pubDate>Mon, 19 Jan 1981 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/160763</guid>
    </item>
    <item>
      <title>RAILROAD CLASSIFICATION YARD TECHNOLOGY. DESIGN METHODOLOGY STUDY</title>
      <link>https://trid.trb.org/View/150984</link>
      <description><![CDATA[The report documents the first phase of a three-phase effort to develop a railroad classification yard design methodology. Topics discussed include: site selection, hump grade profile design, sub-yard capacity requirements, trim-end conflict resolution, yard geometry and layout, yard hardware systems, and yard computer systems.]]></description>
      <pubDate>Tue, 16 Sep 1980 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/150984</guid>
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    <item>
      <title>SURVEYING: AN IMPORTANT ASPECT OF LINE CONSTRUCTION ON DB</title>
      <link>https://trid.trb.org/View/147620</link>
      <description><![CDATA[The surveying department is involved at every level of planning and implementation of major line building projects. It also plays a key role in the case of lines being modernized, extension of S-Bahn lines to outer suburban areas and the construction or modernization of marshalling yards.]]></description>
      <pubDate>Mon, 11 Feb 1980 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/147620</guid>
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    <item>
      <title>MARSHALLING YARDS AND AUTOMATION EQUIPMENT FOR THEM</title>
      <link>https://trid.trb.org/View/146971</link>
      <description><![CDATA[Subjects discussed deal with the general arrangement of a set of splitting and sorting sidings, switch characteristics, the switch operating mechanisms, the operating methods of manual and automatic control of switches, and the braking problems of the various types of brakes.]]></description>
      <pubDate>Wed, 19 Dec 1979 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/146971</guid>
    </item>
    <item>
      <title>COMPUTERISED STUDY OF RAILWAY LAYOUT</title>
      <link>https://trid.trb.org/View/85730</link>
      <description><![CDATA[After general remarks on the first data processing applications for this purpose in the SNCF, the article describes the new program chains: AFGHA for open line studies, and TVA for the layout of stations and marshalling yards.]]></description>
      <pubDate>Fri, 11 May 1979 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/85730</guid>
    </item>
    <item>
      <title>COMPUTER PACKAGE FOR TRACK LAYOUT</title>
      <link>https://trid.trb.org/View/73818</link>
      <description><![CDATA[In this article, the author considers the possible use of computers for track layout and switches in a yard.  He goes on to describe some applications and the advantages of this technique.]]></description>
      <pubDate>Wed, 19 Jul 1978 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/73818</guid>
    </item>
    <item>
      <title>ST. LOUIS RAILROAD GATEWAY TERMINAL RESTRUCTURING PROJECT--PHASE I</title>
      <link>https://trid.trb.org/View/68823</link>
      <description><![CDATA[This report documents the analyses and results of Phase I of the St. Louis Terminal Restructuring Project.  Phase I has been limited to the development and preliminary examination of a physical restructuring plan with order-of-magnitude costs.  This physical restructuring plan for the St. Louis terminal area has been developed by a Technical Advisory Committee (TAC) composed of representatives of the seventeen railroad companies operating in the St. Louis terminal.  The TAC's restructuring plan would provide for expansion of one classification yard, construction of a new classification yard, modification of an existing yard for industry support, construction of a TOFC/COFC facility, and mainline corridor upgrading.  Railroad bridge upgrading would be an option for further analysis.  The TAC's restructuring plan would be refined through substantial additional analysis in Phase II of the project.  The primary community impacts of the restructuring plan would be the release of approximately 800 acres of riverfront land for redevelopment and relocation of approximately seventy dwellings and commercial/institutional structures.]]></description>
      <pubDate>Wed, 26 Apr 1978 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/68823</guid>
    </item>
    <item>
      <title>A MARSHALLING YARD WITH FOUR SETS OF SIDINGS</title>
      <link>https://trid.trb.org/View/60595</link>
      <description><![CDATA[No Abstract]]></description>
      <pubDate>Mon, 30 Jan 1978 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/60595</guid>
    </item>
    <item>
      <title>OVERVIEW OF COMPUTER-BASED MODELS APPLICABLE TO FREIGHT CAR UTILIZATION</title>
      <link>https://trid.trb.org/View/58063</link>
      <description><![CDATA[This report documents a study performed to identify and analyze twenty-two of the important computer-based models of railroad operations.  The models are divided into three categories: network simulations, yard simulations, and network optimizations.  The simulations are used to assess the impact of certain operating policies and planning procedures.  The network simulations examine system-wide effects, while the yard simulations focus on the operations performed within a single yard.  Network optimizations typically are used to calculate optimal distribution for a rail system's empty freight cars based on the railroad's car distribution rules and goals.  The description of each model includes its history, design approach, fundamental logic, unusual features, hardware and software specifications, and its extent of application.  In the case of a model's implementation on a rail system, attempts were made to obtain test results and evaluations.  This served as a basis for reviewing each model.]]></description>
      <pubDate>Mon, 30 Jan 1978 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/58063</guid>
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