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    <title>Transport Research International Documentation (TRID)</title>
    <link>https://trid.trb.org/</link>
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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>
    <image>
      <title>Transport Research International Documentation (TRID)</title>
      <url>https://trid.trb.org/Images/PageHeader-wTitle.jpg</url>
      <link>https://trid.trb.org/</link>
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    <item>
      <title>Dynamics of Highway Guardrails: Laboratory Experiments (II)</title>
      <link>https://trid.trb.org/View/1940182</link>
      <description><![CDATA[This is the third report in a series dealing with small-scale model experiments on the effect of vehicle impact against guardrails. The variables include vehicle impact speed and direction, impact location, initial static tension in the cable, post spacing, and coefficient of sliding friction between wheels and ground. Additional variables introduced into this phase of the investigation include yielding of the post foundations, yielding of the end anchorage, use of a "tension spring" in series with the cable, and use of elastic supports between the cable and the posts. Among the recorded quantities are maximum dynamic cable tension, speed and direction of the vehicle after impact, and post displacement. A correlation has been made between the kinetic energy lost by the vehicle as a result of the impact, and the work done by the frictional forces, by the displacement of the posts, and by the displacement of the end anchorage. A limited investigation of beam-type guardrails has been included. All of the results are presented in terms of full-scale values. General conclusions have been drawn.]]></description>
      <pubDate>Tue, 19 Apr 2022 13:06:49 GMT</pubDate>
      <guid>https://trid.trb.org/View/1940182</guid>
    </item>
    <item>
      <title>Report of Committee on Mineral Aggregates</title>
      <link>https://trid.trb.org/View/1261608</link>
      <description><![CDATA[No abstract.]]></description>
      <pubDate>Mon, 16 Sep 2013 08:06:55 GMT</pubDate>
      <guid>https://trid.trb.org/View/1261608</guid>
    </item>
    <item>
      <title>Report of Committee on Design</title>
      <link>https://trid.trb.org/View/1261609</link>
      <description><![CDATA[No abstract.]]></description>
      <pubDate>Mon, 16 Sep 2013 08:06:55 GMT</pubDate>
      <guid>https://trid.trb.org/View/1261609</guid>
    </item>
    <item>
      <title>Fillers and Bedding Courses for Brick Pavements</title>
      <link>https://trid.trb.org/View/1261610</link>
      <description><![CDATA[No abstract]]></description>
      <pubDate>Mon, 16 Sep 2013 08:06:54 GMT</pubDate>
      <guid>https://trid.trb.org/View/1261610</guid>
    </item>
    <item>
      <title>Magnesium Sulphate Accelerated Soundness Test on Concrete Aggregates</title>
      <link>https://trid.trb.org/View/1260492</link>
      <description><![CDATA[Although several accelerated tests of aggregates have been devised to simulate weathering, no true laboratory measure of soundness has yet been evolved. The use of magnesium sulphate solution is proposed as a substitute for the commonly used sodium sulphate. A direct relationship was found between a freezing and thawing test and the magnesium sulphate test. the absorptive power of sand was also found to bear a general relation to the results of the soundness test.]]></description>
      <pubDate>Mon, 16 Sep 2013 08:06:54 GMT</pubDate>
      <guid>https://trid.trb.org/View/1260492</guid>
    </item>
    <item>
      <title>Curing Concrete Pavements: A Review</title>
      <link>https://trid.trb.org/View/1260495</link>
      <description><![CDATA[No abstract.]]></description>
      <pubDate>Mon, 16 Sep 2013 08:06:54 GMT</pubDate>
      <guid>https://trid.trb.org/View/1260495</guid>
    </item>
    <item>
      <title>Discussion on Vibration</title>
      <link>https://trid.trb.org/View/1260502</link>
      <description><![CDATA[No abstract.]]></description>
      <pubDate>Mon, 16 Sep 2013 08:06:54 GMT</pubDate>
      <guid>https://trid.trb.org/View/1260502</guid>
    </item>
    <item>
      <title>The Effects of Frequency of Vibration in Making Concrete Beams</title>
      <link>https://trid.trb.org/View/1260501</link>
      <description><![CDATA[No abstract.]]></description>
      <pubDate>Mon, 16 Sep 2013 08:06:54 GMT</pubDate>
      <guid>https://trid.trb.org/View/1260501</guid>
    </item>
    <item>
      <title>Experimental Soil-Cement Road in Wisconsin</title>
      <link>https://trid.trb.org/View/1260515</link>
      <description><![CDATA[No abstract.]]></description>
      <pubDate>Mon, 16 Sep 2013 08:06:54 GMT</pubDate>
      <guid>https://trid.trb.org/View/1260515</guid>
    </item>
    <item>
      <title>Soil-Cement Base, Wayne County, Iowa</title>
      <link>https://trid.trb.org/View/1260513</link>
      <description><![CDATA[No abstract.]]></description>
      <pubDate>Mon, 16 Sep 2013 08:03:03 GMT</pubDate>
      <guid>https://trid.trb.org/View/1260513</guid>
    </item>
    <item>
      <title>Pedestrian Research</title>
      <link>https://trid.trb.org/View/1260518</link>
      <description><![CDATA[No abstract.]]></description>
      <pubDate>Mon, 16 Sep 2013 08:03:03 GMT</pubDate>
      <guid>https://trid.trb.org/View/1260518</guid>
    </item>
    <item>
      <title>Research on the Physical Relations of Soil and Soil-Cement Mixtures</title>
      <link>https://trid.trb.org/View/1260521</link>
      <description><![CDATA[No abstract.]]></description>
      <pubDate>Mon, 16 Sep 2013 08:03:03 GMT</pubDate>
      <guid>https://trid.trb.org/View/1260521</guid>
    </item>
    <item>
      <title>Highway Capacity</title>
      <link>https://trid.trb.org/View/1260528</link>
      <description><![CDATA[No abstract.]]></description>
      <pubDate>Mon, 16 Sep 2013 08:03:03 GMT</pubDate>
      <guid>https://trid.trb.org/View/1260528</guid>
    </item>
    <item>
      <title>The Influence of Alignment on Operating Characteristics</title>
      <link>https://trid.trb.org/View/1260529</link>
      <description><![CDATA[No abstract.]]></description>
      <pubDate>Mon, 16 Sep 2013 08:03:02 GMT</pubDate>
      <guid>https://trid.trb.org/View/1260529</guid>
    </item>
    <item>
      <title>Total Travel in North Carolina Municipalities</title>
      <link>https://trid.trb.org/View/1261499</link>
      <description><![CDATA[TO ACCOMPLISH THE BASIC OBJECTIVE OF DETERMINING TOTAL VEHICLE MILES OF TRAVEL ON ALL MUNICIPAL STREETS IN NORTH CAROLINA, SIX "SAMPLE" CITIES AND TOWNS WERE SELECTED FOR COMPLETE COVERAGE BY TRAFFIC COUNT MACHINES AND SHORT COUNT MANUAL METHODS, THE LATTER BEING BASED ON SPECIAL STUDIES AS TO TECHNIQUE. DATA WERE ANALYZED AND CLASSIFIED BY STREET SYSTEMS, TYPES, AND PORTIONS OF TOWN; AND WERE ADJUSTED FOR SEASONAL EFFECT FOR CALENDAR YEAR 1949. USING POPULATION 1940 AND 1950, AND STREET MILEAGE AS CONTROL FACTORS, DATA WERE EXPANDED FROM THE "SAMPLE" TOWNS TO ALL MUNICIPALITIES IN THE STATE. RESULTS WERE RECONCILED AS NEAR AS POSSIBLE WITH VEHICLE-MILE DATA ON RURAL SYSTEMS, AND COMPARED TO TOTAL GASOLINE CONSUMPTION; AND FINALLY EXPRESSED IN TERMS OF PERCENTAGE OF GASOLINE WHICH IS CONSUMED IN TOTAL MUNICIPAL TRAVEL. THE MAJOR CONCLUSION IS THAT ABOUT 34 PERCENT OF TAXED GASOLINE CONSUMED BY MOTOR VEHICLES ON PUBLIC ROADS AND STREETS IN NORTH CAROLINA, IN 1949, WAS CONSUMED ON MUNICIPAL STREETS, 48 PERCENT ON RURAL STATE HIGHWAYS AND 18 PERCENT ON COUNTY ROADS. /AUTHOR/]]></description>
      <pubDate>Mon, 16 Sep 2013 07:57:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/1261499</guid>
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