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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>LOCAL GEOLOGY AND THE STABILITY OF NATURAL SLOPES</title>
      <link>https://trid.trb.org/View/126805</link>
      <description><![CDATA[THE STABILITY OF SAND AND SANDSTONE LAYERS SANDWICHED BETWEEN CLAY OR CLAY-SHALE LAYERS IS CONSIDERED. THE STABLE ANGLE OF SAND SLOPES UNDER THE ACTION OF WATER FLOWING PARALLEL TO THE STRATIFICATION IS CALCULATED. THE EQUILIBRIUM OF A SLOPING MASS OF SAND RESTING ON A CLAY STRATUM IS EXAMINED AND RELATED TO THE DIP OF THE CLAY STRATUM, THE SURFACE SLOPE OF THE SAND MASS, AND THE STRENGTH OF THE CLAY. THE STABILITY OF A SANDSTONE LAYER RESTING ON A CLAY SHALE BED IS ALSO EXAMINED AND THE VARIATION OF THE REQUIRED ANGLE OF SHEARING RESISTANCE WITH DISTANCE FROM AN EXPOSED FACE IS GIVEN. THESE THEORETICAL STUDIES ARE THEN RELATED TO THE FIELD BEHAVIOR OF LAYERED SANDY AND CLAYEY STRATA. /ASCE/]]></description>
      <pubDate>Mon, 05 Sep 1994 00:00:00 GMT</pubDate>
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      <title>EARTHQUAKE-INDUCED DISPLACEMENTS IN SAND EMBANKMENTS</title>
      <link>https://trid.trb.org/View/38497</link>
      <description><![CDATA[If an embankment of dense granular material is accelerated so that all points of the slope experience approximately the same acceleration at the same time the result of overstressing is a surface slide involving a thin layer of soil. The yield acceleration at which this slide will begin to move on any cycle of acceleration can be expressed in terms of the angle of friction and a shear strength intercept both of which are functions of the cumulative downslope displacement. Procedures for computing the magnitude of slope displacements resulting from a sequence of acceleration pulses are presented. Surface displacements determined using these procedures have been shown to be in reasonable agreement with those measured in banks of sand subjected to base acceleration, provided allowance is made for the variation in soil strength and yield acceleration with increasing displacements./ASCE/]]></description>
      <pubDate>Thu, 29 May 1975 00:00:00 GMT</pubDate>
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    <item>
      <title>A TECHNIQUE FOR ESTIMATING THE SLOPE-CLIMBING ABILITY OF WHEELED VEHICLES IN SAND</title>
      <link>https://trid.trb.org/View/106346</link>
      <description><![CDATA[IN A TESTING PROGRAM JOINTLY SUPPORTED BY THE ARMY AND THE NAVY, THE U.S. ARMY ENGINEER WATERWAYS EXPERIMENT STATION HAS CONDUCTED APPROXIMATELY 2500 TESTS OF THE ABILITY OF WHEELED MILITARY VEHICLES TO CLIMB SLOPES OF LOOSE SAND. TESTS WERE CONDUCTED ON A VARIETY OF BEACH AND DUNE SANDS. TEST PROCEDURES AND TECHNIQUES ARE DESCRIBED BRIEFLY. THE STRENGTH OF THE SAND ON THE SLOPES WAS MEASURED BY MEANS OF A CONE PENETROMETER. THE SLOPE-CLIMBING PERFORMANCE OF EACH OF THE FIVE SIZES OF VEHICLES TESTED IS SHOWN TO BE DETERMINED PRINCIPALLY BY THE STRENGTH OF THE SAND AND BY TIRE SIZE AND INFLATION PRESSURE. THE EFFECT OF EACH OF THESE VARIABLES ON PERFORM- ANCE IS DISCUSSED BRIEFLY. AN EMPIRICAL METHOD EMPLOYING FIRM-SURFACE TIRE-PRINT DATA, WHEEL LOAD, AND SAND STRENGTH IS PRESENTED AS A MEANS OF PREDICTING THE SAND SLOPE-CLIMB- ING CAPACITY OF CONVENTIONAL ALL-WHEEL-DRIVE VEHICLES. /NTIS/]]></description>
      <pubDate>Mon, 20 Aug 1973 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/106346</guid>
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      <title>SLOPE STABILITY IN NON-COHESIVE SOILS UNDER SEISMIC ACTION /IN SPANISH/</title>
      <link>https://trid.trb.org/View/128535</link>
      <description><![CDATA[PRESENTED IN THIS PAPER ARE THE RESULTS OF IN SITU AND LABORATORY TESTS ON SAND AND GRAVEL. ONE OF THE CHARACTERISTICS ANALYSED WAS THE RESIDUAL STRENGTH. DETAILS ARE GIVEN OF SOME LARGE-SCALE TESTS AND OBSERVATIONS ON THE NATURAL SLOPE OF THE SITE ON WHICH THE HYDRAULIC WORKS OF ULLUM ARE TO BE CONSTRUCTED. /TRRL/]]></description>
      <pubDate>Mon, 07 Aug 1972 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/128535</guid>
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    <item>
      <title>IMPROVED ESTABLISHMENT AND MAINTENANCE OF ROADSIDE VEGETATION IN MICHIGAN</title>
      <link>https://trid.trb.org/View/95900</link>
      <description><![CDATA[THIS INVESTIGATION OF RAPID, UNIFORM ESTABLISHMENT OF A VEGETATIVE COVER FOR MICHIGAN ROADSIDES INVOLVED 22 EXPERIMENTS CONDUCTED FROM 1963 TO 1970 ON LOAMY CLAY CUT SLOPE, LOAM CLAY FILL SLOPE, SANDY CUT SLOPE, SANDY MEDIAN, AND SANDY LOAM MEDIAN SITES. SEED MIXTURE STUDIES INDICATED THAT A MINIMUM OF 20%, ON A SEED NUMBER BASIS, EACH OF KENTUCKY BLUEGRASS, RED FESCUE, AND PERENNIAL RYEGRASS SHOULD BE INCLUDED AS THE BASIC COMPONENTS OF THE SEED MIXTURE. THE OPTIMUM SEEDING RATE WAS IN THE 80 TO 100 POUND PER ACRE RANGE. ADEQUATE ESTABLISHMENT WAS ACHIEVED WITH SEEDINGS MADE DURING THE PERIOD FROM MAY 1 TO OCTOBER 10. THE SOIL INCORPORATION OF 80 POUNDS PER ACRE OF NITROGEN, PHOSPHORIC ACID AND POTASH WAS THE BEST SEEDBED FERTILIZATION PRACTICE. THE MULCHES THAT PROVIDED ADEQUATE SOIL STABILIZATION AND THE PROPER MICROENVIRONMENT FOR SEED GERMINATION AND GRASS ESTABLISHMENT WERE: STRAW MULCH (2 TONS PER ACRE) PLUS ASPHALT (150 GALLONS PER ACRE); SOIL RETENTION MAT OR EXCELSIOR; AND SHREDDED WOOD AND BARK (9 TO 10 TONS PER ACRE). /AUTHOR/]]></description>
      <pubDate>Sun, 09 Jul 1972 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/95900</guid>
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