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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>HIGH-SPEED RAIL CARS, MONORAILS AND SYSTEMS. TECHNICAL ASSISTANCE MANUAL</title>
      <link>https://trid.trb.org/View/381552</link>
      <description><![CDATA[The technical assistance document is one of a series provided to help in understanding the background and underlying rationale of the Americans with Disabilities Act Accessibility Guidelines for Transportation Vehicles (Vehicle Guidelines) and how the guidelines may apply in a particular case.  The report is on high-speed rail cars, monorails and systems.]]></description>
      <pubDate>Mon, 14 Feb 2000 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/381552</guid>
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      <title>GERMANY'S TRANSRAPID: HOW FAST IS FAST ENOUGH?</title>
      <link>https://trid.trb.org/View/475573</link>
      <description><![CDATA[While the latest generation of France's Train a Grand Vitesse (GTV) is being readied to operate at speeds of 350 km/h (241 m/h) on existing HSR trackage, there is another exciting high speed ride that over 300,000 rail buffs from Germany and many other countries have already experienced.  This, the world's first revenue producing Mag-Lev delights its riders.  The article discusses the criticism that asks if it simply costs too much for the small speed increment gained over "conventional" high speed rail with speeds of "only" 400km/h (250m/h).]]></description>
      <pubDate>Mon, 16 Feb 1998 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/475573</guid>
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      <title>THE ECONOMIC IMPACT OF HIGH SPEED RAIL</title>
      <link>https://trid.trb.org/View/475574</link>
      <description><![CDATA[This article advances two simple hypotheses: 1) that high-speed rail has the natural effect of increasing the concentration of economic activity in Europe's major conurbations, and 2) that the development of a positive benefit for regions affected by new high-speed rail developments requires careful planning and policy intervention to effect necessary ancillary investment.  The first section of the article examines the ways in which high-speed rail has a centralizing effect. The second considers a brief history of the approaches to the Channel Tunnel and its associated infrastructure in the UK and France.  The third considers some evidence on the impact so far, and the final section draws some conclusions as to the lessons learned about the impact of the development of such a large-scale infrastructure and policy responses to them.]]></description>
      <pubDate>Mon, 16 Feb 1998 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/475574</guid>
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      <title>PREDICTION ANALYSIS OF TRAIN-INDUCED GROUND VIBRATIONS USING THE EQUIVALENT EXCITATION FORCE</title>
      <link>https://trid.trb.org/View/482278</link>
      <description><![CDATA[Train-induced ground vibrations show complicated characteristics depending on various local conditions of the considered site. This paper presents a new practical method to predict the vibrations taking the local conditions into consideration.  It is a key for the prediction analysis of how to assume the excitation force.  A scheme was developed in which the equivalent excitation force is estimated through vibrations measured at a reference site.  It is used for exciting the dynamic system of prediction site.  After formulating the method it is applied to predict ground vibrations induced by the Shinkansen passing through on an embankment structure.  The case study shows not only the ease of applying the method but also a general agreement of computed vibrations with measured ones.]]></description>
      <pubDate>Fri, 25 Apr 1997 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/482278</guid>
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      <title>A STUDY OF AERODYNAMIC STABILITY OF LOW NOISE PANTOGRAPH</title>
      <link>https://trid.trb.org/View/482279</link>
      <description><![CDATA[Reduction of noise generated around  a pantograph is a requisite for reduction of wayside noise. The paper proposes a low noise pantograph named PEGASUS.  This pantograph has an aerodynamically smooth shape without generating a large aerodynamic noise.  The greatest difficulty in its development lies in the realization of aerodynamic stability.  A panhead supporting mechanism has been contrived to get aerodynamic stability, and its efficiency has been confirmed by some experiments.  This paper shows the performance of PEGASUS focusing on its aerodynamic stability.]]></description>
      <pubDate>Fri, 25 Apr 1997 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/482279</guid>
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      <title>A REVIEW OF METHODS TO CONTROL RAILWAY NOISE SOURCES</title>
      <link>https://trid.trb.org/View/482274</link>
      <description><![CDATA[To obtain the methods to reduce railway noise, it is necessary to locate their sources and to clarify the physical mechanisms of the noise generation.  The paper reviews studies and development of methods to reduce noise as well as the application of countermeasures since the opening of Shinkansen. The main devices of countermeasures and the possibilities of noise reduction are outlined.]]></description>
      <pubDate>Thu, 24 Apr 1997 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/482274</guid>
    </item>
    <item>
      <title>ICE 3 ON RIGHT TRACKS FOR HIGH-SPEED RAIL HARMONISATION</title>
      <link>https://trid.trb.org/View/470812</link>
      <description><![CDATA[To meet the requirements of a more integrated transportation infrastructure, the various European high speed rail networks are being "harmonized" to ensure free and unrestricted international access for both freight and passenger trains.  To meet the obviously stringent operational and technical requirements, railway authorities and the European railway industry are working closely together to meet tight harmonization schedules.  This article takes a brief look at the new ICE 3 high speed train built by a consortium headed by Siemens AG, which meets requirements for pan-European operation.]]></description>
      <pubDate>Thu, 20 Feb 1997 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/470812</guid>
    </item>
    <item>
      <title>RADIATED AERODYNAMIC NOISE GENERATED BY HIGH-SPEED TRACKED VEHICLES</title>
      <link>https://trid.trb.org/View/450992</link>
      <description><![CDATA[The origins and manifestations of aerodynamic noise generated by high-speed tracked vehicles are discussed, and examples of measurements on magnetically levitated and wheeled trains are used to illustrate the significance of this noise.  Sound-source location measurements with microphone arrays and the difficulties encountered in predicting aeronoise are also discussed.]]></description>
      <pubDate>Mon, 18 Sep 1995 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/450992</guid>
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    <item>
      <title>SAFETY OF HIGH SPEED GUIDED GROUND TRANSPORTATION SYSTEMS. BROADBAND MAGNETIC FIELDS: THEIR POSSIBLE ROLE IN EMF-ASSOCIATED BIOEFFECTS</title>
      <link>https://trid.trb.org/View/381165</link>
      <description><![CDATA[This report reviews electric and magnetic field (EMF) exposures from electrical transportation systems, including electrically powered rail and magnetic levitation (maglev).  Material also covered includes research concerning biological effects of EMF exposure, with special emphasis on broad spectrum or broadband magnetic fields.  A primary objective of this report was to consider, based on present knowledge, the potential for adverse health effects from maglev-associated EMF.  Because maglev technology is known to generate magnetic fields at a variety of frequences, this document addresses the broadband EMF frequency characteristics (including pulses, intermittent fields, and other transient phenomena).  One objective of this review was to consider whether, based on present knowledge, exposure to maglev-associated magnetic fields would warrant any special consideration related to possible adverse health effects.  There may be unique combinations of ac and dc fields associated with maglev operation, but there is no evidence that such combinations have any special properties in terms of their potential EMF biological effects.  From currently available occupational epidemiological data for electrical transport workers, available clinical and laboratory data on EMF biological effects, and available information on maglev-generated magnetic fields, it is concluded that maglev is not likely to represent greater risk, if any, than that from electrical transport systems already in use.]]></description>
      <pubDate>Tue, 25 Jan 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/381165</guid>
    </item>
    <item>
      <title>SUPERCONDUCTING MAGNET SUSPENSIONS IN HIGH SPEED GROUND TRANSPORT</title>
      <link>https://trid.trb.org/View/23994</link>
      <description><![CDATA[There are a number of magnetic suspensions of which superconducting suspensions are a subset. In these suspensions the movement of the vehicle is used to induce currents in a conducting track which then interacts with the magnets on the vehicle to produce a repulsive suspension force. This work provides a technical and economic definition of high speed ground transport systems using these suspensions. The full range of common superconducting suspensions and of propulsions are covered with designs produced for speeds ranging from 100 m/s (225 miles/hr) to 250 m/s (560 mile/hr). For operating cost evaluation, throughputs ranging from one to thirty million seats per annum, each way, are considered. Technical descriptions of the vehicles, their suspensions, propulsions and tracks are given in some detail and operating costs are presented for all the systems together with details of the breakdown of costs and the capital costs involved.]]></description>
      <pubDate>Fri, 26 Jun 1981 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/23994</guid>
    </item>
    <item>
      <title>COMPOSITE CONDUCTOR RAILS FOR RAPID TRANSPORTATION SYSTEMS - STATE OF THE ART</title>
      <link>https://trid.trb.org/View/45147</link>
      <description><![CDATA[By way of introduction some details of the rapid transportation networks planned in various countries are given together with an account of the kind of development work involved.  Rapid transportation systems are intended to operate over distances of 200 to 600 km.  Speeds of up to 500 km per hour are planned and so a whole series of problems not previously encountered have to be solved.  The paper deals mainly with the problems concerning the conductor rail which has to supply the electrical power to the vehicle.  The need for a lightweight ac rail makes composite rails attractive.  A wide range of conductor rails available is presented and it is shown that the need for a lightweight rail eliminates a number of otherwise interesting designs.  Factors such as corrosion resistance, rigidity and safety are discussed with a view to their importance and limits which can be tolerated.]]></description>
      <pubDate>Fri, 05 Jun 1981 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/45147</guid>
    </item>
    <item>
      <title>OPERATIONAL POTENTIAL OF SUSPENDED VEHICLE SYSTEMS (SVS)</title>
      <link>https://trid.trb.org/View/23776</link>
      <description><![CDATA[Earlier high speed ground transportation (HSGT) studies have confirmed the feasibility of high speed suspended vehicle systems (SVS). This study determines the operating regimes within which the SVS offers potential advantages over other HSGT alternatives such as high speed rail (HSR) and tracked air cushion vehicle (TACV) systems. Each system type provides an equal level of transportation service for typical high speed applications, including 200 mile intercity and 40 mile airport access corridors. Various design options concerning guideway supporting structures for above, below and at-grade construction are examined considering costs and planning and community preferences for each basic land use category. Collocation with existing transportation corridors offers the potential of significantly reduced right-of-way costs and less negative impact on the surrounding community.]]></description>
      <pubDate>Fri, 29 May 1981 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/23776</guid>
    </item>
    <item>
      <title>SUSPENDED CONCEPTS FOR HIGH-SPEED GROUND TRANSPORTATION</title>
      <link>https://trid.trb.org/View/45622</link>
      <description><![CDATA[This article, for the benefit of the uninitiated, discusses in general terms the characteristics of the following transport systems: mechanical (wheel/rail), air cushion, magnetic levitation, aerodynamic, electrodynamic repulsion, with reference to high-speeds, drag/levitation force ratio, and energy consumption for both levitation and propulsion.]]></description>
      <pubDate>Wed, 23 Jun 1976 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/45622</guid>
    </item>
    <item>
      <title>HIGH POWER TRACTION CURRENT COLLECTION AT HIGH SPEEDS. POWER COLLECTION BY AN ELECTRIC ARC</title>
      <link>https://trid.trb.org/View/15341</link>
      <description><![CDATA[This report gives an account of the various possibilities of power transfer from a fixed towards a moving installation and it concludes that the electric arc is the most advantageous method at high speeds.  It also contains a description of the tests with the object of obtaining adequate stability of the arc at inter-electrode gaps between 1 and 10 cm.  It enumerates the problems still to be solved: rapid wear of the electrodes, reduction of the disturbing electro-magnetic fields, influence of the wind.]]></description>
      <pubDate>Sat, 05 Jun 1976 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/15341</guid>
    </item>
    <item>
      <title>HIGH-SPEED DYNAMIC PERFORMANCE OF THE LINEAR INDUCTION MOTOR RESEARCH VEHICLE</title>
      <link>https://trid.trb.org/View/41276</link>
      <description><![CDATA[The linear induction motor research vehicle (LIMRV) recently set a world speed record of 255.7 mph for steel-wheel-on-steel-rail vehicles during a series of test runs conducted on the 6.2 mile-long experimental track at the Transportation Test Center, Pueblo, Colorado.  This paper presents performance data on LIMRV dynamics associated with acceleration, steady-state operation, and braking, as recorded during these tests.  Actual test results are compared with analytical predictions. Difficulties encountered are discussed and their solutions described.]]></description>
      <pubDate>Sat, 05 Jun 1976 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/41276</guid>
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