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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>
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    <managingEditor>tris-trb@nas.edu (Bill McLeod)</managingEditor>
    <webMaster>tris-trb@nas.edu (Bill McLeod)</webMaster>
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      <title>MODELS OF HUMAN REACTION TO VEHICLE ENVIRONMENTS</title>
      <link>https://trid.trb.org/View/81048</link>
      <description><![CDATA[Models for predicting human comfort responses to environmental variables are presented for diverse vehicles. Air mode studies reveal that comfort is a function of vertical and transverse accelerations, noise levels and seat factors, as well as manoeuvre conditions. Comfort models for ground-based vehicles involve roll rates and noise levels. /Author/TRRL/]]></description>
      <pubDate>Tue, 27 Feb 1979 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/81048</guid>
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      <title>EFFECT OF THE DAMPING OF CROSSWISE OSCILLATIONS ON THE LATERAL STRESSES CREATED IN THE TRACK BY LOCOMOTIVES RUNNING AT HIGH SPEEDS</title>
      <link>https://trid.trb.org/View/80949</link>
      <description><![CDATA[No Abstract.]]></description>
      <pubDate>Tue, 27 Feb 1979 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/80949</guid>
    </item>
    <item>
      <title>THE EFFECT OF SPRING STIFFNESS, FRICTION DAMPING LEVEL, AND CAR BODY STIFFNESS UPON THE RIDE QUALITY OF RAILROAD FREIGHT CARS</title>
      <link>https://trid.trb.org/View/78223</link>
      <description><![CDATA[An over-the-road test was performed for the purpose of determining the effect of various levels of spring stiffness and friction damping upon the ride quality of three different types of railroad cars.  The primary difference among the three cars was their bending stiffness.  They were a 50-ft, 70-ton box car, a standard level piggyback flat car, and a wide body, fully enclosed, tri-level autorack car.  Instrumentation consisted of spring deflection transducers, vertical and lateral accelerometers and strain gages.  Data will be presented primarily in the format of plots of acceleration versus speed with supporting plots of spring displacement and roll angles.]]></description>
      <pubDate>Sat, 03 Feb 1979 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/78223</guid>
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      <title>UNEVEN WHEELSET MOTION</title>
      <link>https://trid.trb.org/View/45904</link>
      <description><![CDATA[Rolling, resonance and instability are terms used to describe the riding qualities of a rail vehicle.  The article explains how these factors are recorded during tests and how instrumentation engineers interprete them.]]></description>
      <pubDate>Tue, 13 Jul 1976 00:00:00 GMT</pubDate>
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      <title>LATERAL STABILITY OF BOGIES AT HIGH SPEEDS. THE INFLUENCE OF A NON-LINEAR TORQUE OF THE BOGIE-BODY SYSTEM</title>
      <link>https://trid.trb.org/View/45905</link>
      <description><![CDATA[The lateral stability of a bogie at high speeds can be improved by greater torsional stiffness of the roll damper suspension system.  The maximum critical speed which can be reached by increasing the roll damping torque is identical to that obtained by a linear analysis which takes into account the torsional stiffness of the suspension system.  The maximum critical speed depends on the design features of the bogie and on the wheelset mileage.  For a given bogie, the value of the torsional stiffness of the suspension system determines the highest critical speed which can be reached by increasing the amplitude of the roll damping torque.]]></description>
      <pubDate>Tue, 13 Jul 1976 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/45905</guid>
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    <item>
      <title>A CRITERION FOR THE CONTROL OF 100 TON HOPPER CAR ROLL MOTION</title>
      <link>https://trid.trb.org/View/12885</link>
      <description><![CDATA[A program of experimental investigation was undertaken by the Canadian National Railways with the object of preventing 100 ton hopper cars from derailing. It has been realized for several years that 100 ton hopper cars have a tendency to derail at low speeds and that the derailments are associated with excessive car rolling. The solution to the problem requires that the roll motion be kept within tolerable limits under service conditions. The control which is needed to limit the roll motion can be achieved by appropriate modifications to the suspension system. The selection of the most suitable modification involves an engineering decision based upon an understanding of the environmental conditions. An empirical approach to the problem was taken by the Canadian National to provide the environmental data necessary to evaluate the performance of any car, with or without modifications to the suspension. This paper discusses data derived from this experimental work and presents a criterion for the control of the roll motion.]]></description>
      <pubDate>Thu, 14 Nov 1974 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/12885</guid>
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