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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>THE KANSAS TEST TRACK PART I--ANALYSIS OF TEST DATA</title>
      <link>https://trid.trb.org/View/144792</link>
      <description><![CDATA[This report presents the results of an experimental project to compare the performance of different track support systems.  Data obtained during the project are summarized, presented, and analyzed.  Based on these data, conclusions are made regarding the performance of the different track support systems.  Details of instruments used for data measurement, their location in track, test procedures, and test data are presented in Part II of the report.]]></description>
      <pubDate>Mon, 11 Feb 1980 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/144792</guid>
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      <title>THE KANSAS TEST TRACK PART II--APPENDICES</title>
      <link>https://trid.trb.org/View/144793</link>
      <description><![CDATA[This report presents data obtained from an experimental project to compare the performance of different track support systems.  Also, it describes instruments used for data measurement, their location in track, and test procedures.  Analysis and evaluation of test data are presented in Part I of the report.]]></description>
      <pubDate>Mon, 11 Feb 1980 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/144793</guid>
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    <item>
      <title>MECHANICAL IMPEDANCE EVALUATIONS OF THE KANSAS TEST TRACK: PRETRAFFIC AND POSTTRAFFIC TESTS</title>
      <link>https://trid.trb.org/View/144794</link>
      <description><![CDATA[The Kansas Test Track (KTT) was comprised of nine different track systems whose dynamic response was measured in two series of impedance tests.  Pretraffic impedance testing was done in 1973, before the KTT was opened to traffic, and a second (Posttraffic) test series was carried out in 1975 after the KTT had experienced premature failure in service. Results of these tests, presented in the form of impedance and velocity transfer ratio plots, have been used to characterize the various KTT track systems according to their initial dynamic stiffness and component behavior. Known limitations of the test apparatus precluded a detailed analysis; however, a linear idealization was developed to grossly model track system response.  These results illustrate the feasibility of an impedance approach to the structure-ballast-interaction processes which govern track system performance.]]></description>
      <pubDate>Mon, 11 Feb 1980 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/144794</guid>
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      <title>POSTMORTEM INVESTIGATION OF THE KANSAS TEST TRACK, VOLUME I</title>
      <link>https://trid.trb.org/View/144795</link>
      <description><![CDATA[The Kansas Test Track (KTT) was comprised of nine different track systems, which were built on a designed embankment. The KTT subgrade experienced premature failure in service, and KTT operations were terminated in June 1975 after six months of operation.  A postmortem investigation of KTT was carried out in 1975 and 1976.  Volumes I and II document the structure, ballast, and embankment studies carried out by the U. S. Army Engineer Waterways Experiment Station in the postmortem investigation.  Results presented in Volume I provide needed insight into track system behavior and are particularly descriptive of ballast and embankment performance.  A rationale is presented to explain the mechanism of failure in the subgrade, and attention is drawn to the structure-ballast-subgrade interaction processes which govern track system performance.  Inadequate drainage of the top of the KTT embankment led to moisture content increases in the top of subgrade from 1971 to 1974, when traffic commenced.  The embankment clay was moderately to highly plastic, and moisture-induced loss of strength in the top few inches of subgrade was the principal cause of failure.]]></description>
      <pubDate>Mon, 11 Feb 1980 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/144795</guid>
    </item>
    <item>
      <title>POSTMORTEM INVESTIGATION OF THE KANSAS TEST TRACK, VOLUME II</title>
      <link>https://trid.trb.org/View/144796</link>
      <description><![CDATA[The Kansas Test Track (KTT) was comprised of nine different track systems, which were founded on a designed embankment. The KTT subgrade experienced premature failure in service, and KTT operations were terminated in June 1975 after approximately six months of traffic.  A postmortem investigation of the KTT was carried out in 1975 and 1976. Results of this investigation are presented in two volumes. Summary data, analyses, conclusions, and recommendations are presented in Volume I.  Volume II is comprised of five appendixes which document the equipment and procedure used, and data obtained in KTT structures, vibroseismic, penetrometer, trenching, and instrumentation testing.]]></description>
      <pubDate>Mon, 11 Feb 1980 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/144796</guid>
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      <title>ANALYSIS OF KANSAS TEST TRACK BEAM RESPONSE</title>
      <link>https://trid.trb.org/View/56693</link>
      <description><![CDATA[In the fall of 1975 post-mortem static and dynamic tests were conducted on a reinforced twin concrete beam section of the Kansas Test Track (KTT) near El Dorado, Kansas. These tests were part of an extensive program undertaken by the Federal Railroad Administration to gain insight into the mechanisms of the rapid deterioration of that test facility. The data from the static and dynamic tests were used to validate a dynamic track structure model of the KTT beam sections. This report presents a summary of the validation process and the subsequent use of the model as an analytical tool for parameter studies. These studies assist in the investigation of the nature of the KTT beam performance, give insight into the behavior of beam and slab track structures, and provide the technical background for evaluation of future non-conventional track structure designs.]]></description>
      <pubDate>Wed, 09 Nov 1977 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/56693</guid>
    </item>
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      <title>EMBANKMENT SUPPORT FOR KANSAS TEST TRACK. ANALYSIS OF EMBANKMENT INSTRUMENT DATA</title>
      <link>https://trid.trb.org/View/47916</link>
      <description><![CDATA[Static and dynamic data collected from the embankment instrumentation at the Kansas Test Track are summarized in this report. The static data included permanent horizontal and vertical deformation measurements, moisture contents, and temperatures taken at intervals between the end of embankment construction in Fall 1971 to the opening of the track for traffic in October 1974. Data were also collected through April 1975 after the track was opened to traffic. Dynamic instrument response was measured at three periods between October 1974 and April 1975. The dynamic data include horizontal and vertical deformations and embankment pressure under traffic loads. The static and dynamic response and performance of each test section are analyzed, and the results are summarized.]]></description>
      <pubDate>Wed, 11 May 1977 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/47916</guid>
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      <title>THE KANSAS TEST TRACK. NON-CONVENTIONAL TRACK STRUCTURES. DESIGN REPORT</title>
      <link>https://trid.trb.org/View/7746</link>
      <description><![CDATA[The report discusses the design of three non-conventional railroad track support structures.  These non-conventional structures, which include a continuously reinforced concrete slab, twin cast-in-place concrete beams and twin precast concrete beams, are part of a research program to develop practical, low maintenance, high quality track structures for conventional and advanced rail vehicles.  Included in this report are discussions of basic structural concepts, design methods and models, and recommended construction, inspection and maintenance techniques.  (Author)]]></description>
      <pubDate>Tue, 09 Mar 1976 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/7746</guid>
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      <title>SANTA FE-DOT TEST TRACK: 'SUBSTANTIAL STEP IN LONG JOURNEY'</title>
      <link>https://trid.trb.org/View/13518</link>
      <description><![CDATA[The test track nearing completion is located in heavy freight-traffic territory, include concrete ties, beams and slabs.  Sophisticated instrumentation, including a load-cell" tie specially designed for this project, will be used to monitor the performance of the test components.]]></description>
      <pubDate>Sat, 24 Jan 1976 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/13518</guid>
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