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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 ELECTRONIC TREATMENT OF GEOCHEMICAL DATA. APPLICATION TO SOME ORDINARY PROBLEMS</title>
      <link>https://trid.trb.org/View/118104</link>
      <description><![CDATA[MODERN METHODS OF ANALYSIS LEAD TO A CONSIDERABLE INCREASE IN QUANTITATIVE GEOLOGICAL AND GEOCHEMICAL DATA. ELECTRONIC CALCULATION IS THE ONLY MEANS OF APPLYING A RIGOROUS STATISTICAL TREATMENT TO SUCH A MASS OF INFORMATION. THE PRINCIPLES OF A GEOCHEMICAL CARD INDEX WHICH WE HAVE DEVELOPED, ARE OUTLINED, AND SOME PROGRAMMES FOR AN IBM 7094 ARE GIVEN. /LCPC/A/RRL/]]></description>
      <pubDate>Sun, 15 Aug 2004 01:47:12 GMT</pubDate>
      <guid>https://trid.trb.org/View/118104</guid>
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      <title>VISUAL ACUITY AND DRIVING RECORD</title>
      <link>https://trid.trb.org/View/116215</link>
      <description><![CDATA[A RESEARCH PROGRAM IS OUTLINED AND RESULTS OBTAINED FROM PRELIMINARY DATA ANALYSES ARE PRESENTED. THE RESEARCH PROGRAM IS DESIGNED TO DETERMINE WHETHER RELATIONSHIPS CAN BE FOUND BETWEEN HOW WELL A PERSON SEES AND HOW WELL HE DRIVES AS REFLECTED IN HIS DRIVING RECORD. VOLUNTARY TEST SUBJECTS WERE SELECTED FROM DRIVER LICENSE APPLICANTS IN CALIFORNIA TO MEASURE VISUAL PERFORMANCE AND OBTAIN PERSONAL AND DRIVING INFORMATION. WHENEVER POSSIBLE, THE INSURANCE RECORD FOR EACH APPLICANT WAS LOCATED AND EXAMINED. THE ACCUMULATED INFORMATION WAS CODED, PLACED ON IBM PUNCH CARDS, AND PROCESSED WITH AN IBM 7094 COMPUTER. RESULTS OF THE PRELIMINARY ANALYSES SHOW' /1/ THERE IS EVIDENCE SUGGESTING A POSITIVE RELATIONSHIP BETWEEN GOOD DYNAMIC VISUAL ACUITY AND GOOD DRIVING RECORD, /2/ EVIDENCE INDICATES A SIGNIFICANT DIFFERENCE IN DRIVING RECORD BETWEEN VOLUNTEER SUBJECTS AND DRIVERS WHO REFUSED TO PARTICIPATE IN THE STUDY, THE LATTER HAVING A POORER RECORD, /3/ THE ANALYSES SHOW A DEFINITE RELATIONSHIP BETWEEN PERFORMANCE ON THE DYNAMIC VISUAL ACUITY TEST AND SEX, AGE, AND STATIC ACUITY. PERFORMANCE ON THE TEST IS POORER FOR FEMALES THAN FOR MALES, BECOMES GRADUALLY POORER WITH INCREASING AGE, AND IS SIGNIFICANTLY CORRELATED WITH STATIC VISUAL ACUITY. THE MAJOR IMPORTANCE OF FINDING THAT DYNAMIC VISUAL ACUITY IS RELATED TO AGE AND SEX IS THAT IT SUGGESTS THE POSSIBLE NEED FOR DIFFERENTIAL LICENSING REQUIREMENTS FOR DIFFERENT AGE- SEX CATEGORIES IN THE EVENT A DYNAMIC TEST IS EVER INCORPORATED INTO THE LICENSING PROCEDURE.]]></description>
      <pubDate>Thu, 22 Dec 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/116215</guid>
    </item>
    <item>
      <title>ANALYSES OF RAIL VEHICLE DYNAMICS IN SUPPORT OF DEVELOPMENT OF THE WHEEL RAIL DYNAMICS RESEARCH FACILITY</title>
      <link>https://trid.trb.org/View/10559</link>
      <description><![CDATA[The development of experimental facilities for rail vehicle testing at the DOT High Speed Ground Test Center is being complemented by analytical studies. The purpose of this effort has been to gain insight into the dynamics of rail vehicles to guide the equipment development and to establish an analytic framework for the design and interpretation of tests to be conducted at the facility. The mechanics of rail vehicle lateral guidance are reviewed on the basis of linearized models. Computer programs are developed for predicting stability and general lateral response characteristics. Computer programs for predicting vertical and pitch vehicle response to track irregularities are included. (Modified author abstract)]]></description>
      <pubDate>Sat, 31 Jan 1981 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/10559</guid>
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      <title>ANALYSIS AND RATING OF PLATE GIRDER RAILWAY BRIDGES. PROGRAM NO. 5 OCTOBER 69</title>
      <link>https://trid.trb.org/View/38409</link>
      <description><![CDATA[File name is AAR 5.  This program is used to analyze and rate single plate girder railway bridges.  All rating is in accordance with the 1969 AREA specifications and is based on member cross section only.  The girders may be deck or through and may be ballasted.  Seven common types of girder cross-section are considered and each may have cover plates both top and bottom.  For rating purposes, eight classes of steel may be specified.  If an analysis is required the structure may be considered subject to the basic types of loading used in Program No. 1.  For rating purposes, the girders are analyzed for a Cooper E80 load automatically.  A maximum of 10 points on the girder can be analyzed or rated.  The input required is girder section properties, total uniform dead load for the girder weight, track weight, and other dead loads; various live loads, impact and wind.  Output includes a listing of member sections entered and a listing of dead load shears and moments.  If the girder is rated, moments, shears and stresses are output for an E80 loading without impact as well as a rating for moment and shear for all sections for train speeds of 40, 30 20 and 10 mph.  If the girder is to be analyzed, live load moments, shears and stresses are output without impact.  Total values including dead load, live load and impact are also output.  It is possible to analyze a girder for shear and moment only, thus reducing the input considerably.]]></description>
      <pubDate>Wed, 27 Aug 1975 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/38409</guid>
    </item>
    <item>
      <title>ANALYSIS AND RATING OF RAILWAY BRIDGE FLOORS (PROGRAM NO. 6 DECEMBER 1970)</title>
      <link>https://trid.trb.org/View/38421</link>
      <description><![CDATA[The file name is AAR 6. This program is used to analyze and rate floor systems of railway bridges.  All rating is in accordance with the 1969 AREA specifications and is based on member cross section only.  The deck is not analyzed or rated.  Five types of floor system may be selected and seven common types of member cross-section are considered as in Program No. 5.  For rating purposes, eight classes of steel may be specified.  If an analysis is required the floor system may be considered subject to the basic types of loading used in Program No. 1 and No. 5.  For rating purposes, members are analyzed for a Cooper E80 load automatically.  A maximum of 10 points on members can be analyzed or rated.  The input required includes member span lengths and section properties uniform dead load on members, member spacing, track location and weight, and other dead loads; various live loads, impact and wind. Output includes a listing of member sections entered and a listing of dead load shears and moments.  If the members are rated, moments, shears and stresses are output for an E80 loading without impact as well as a rating for moment and shear for all sections for train speeds of 40, 30, and 10 mph.  If the members are to be analyzed, live moments, shears and stresses are putput without impact.  Total values including dead load, live load and impact are also output. It is possible to analyze members for shear and moment only, thus reducing the input considerably.]]></description>
      <pubDate>Wed, 27 Aug 1975 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/38421</guid>
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    <item>
      <title>RATING OF RAILWAY TRUSS BRIDGES (PROGRAM NO. 4 REVISED DECEMBER)</title>
      <link>https://trid.trb.org/View/38428</link>
      <description><![CDATA[The file name is AAR 4.  This program calculates the Cooper rating of each member in trusses of any configuration.  The restrictions placed on trusses containing counters described for Program No. 2, apply to this program.  Trusses may be simply supported, continuous over several supports, internally indeterminate or contain counter diagonals.  The span cannot exceed 620 feet, the truss can have no more than 50 joints or 100 members or 25 panels, and the number of panels with counters cannot exceed 10.  No compression member may have a slenderness ratio (L/r) greater than 200.  The imput data required is the dead loading the truss geometry, properties of members, the type of materials and riveted or pinned connections. Output is similar to the earlier program but includes Cooper rating of each member with full steam impact at synchronous speed or with full diesel impact (40 mph) and at reduced speeds of 30, 20 and 10 mph for diesel impact. Rating is in accordance with 1967 AREA specifications; however, wind loads are not considered.]]></description>
      <pubDate>Wed, 27 Aug 1975 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/38428</guid>
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