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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>
    <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>AN ENGINEERING SOIL SURVEY OF FAYETTE COUNTY, KENTUCKY</title>
      <link>https://trid.trb.org/View/121375</link>
      <description><![CDATA[AGRICULTURAL SOIL SCIENTISTS HAVE DEVELOPED A SYSTEM OF SOIL CLASSIFICATION AND MAPPING THAT HAS BEEN AND IS CONTINUING TO BE OF GREAT VALUE TO THE SOILS ENGINEER IN RECONNAISSANCE AND MAPPING.  THIS REPORT COVERS A STATISTICAL METHOD OF CORRELATION USED IN A PILOT STUDY CONDUCTED IN ORDER TO MAKE ENGINEERING SOILS DATA AVAILABLE FROM A PEDOLOGICAL MAP OF FAYETTE COUNTY, KY.  ASSUMING THAT THE RELIABILITY OF PEDOLOGICAL CLASSIFICATIONS HOLDS TRUE FOR ENGINEERING PROPERTIES, THE ENGINEERING TEST CONSTANTS FOR A GIVEN HORIZON OF A GIVEN SOIL SHOULD FALL WITHIN A NARROW RANGE, AND THE LIMITS OF THIS RANGE SHOULD BE REASONABLY DETERMINABLE FROM THE RESULTS OF TESTS ON A SMALL NUMBER OF RANDOM SAMPLES. IN THE PRESENT STUDY A RANGE WITH A CONFIDENCE COEFFICIENT OF 0.90 WAS DETERMINED BY THE STATISTICAL METHOD USED. /AUTHOR/]]></description>
      <pubDate>Sun, 15 Aug 2004 02:39:07 GMT</pubDate>
      <guid>https://trid.trb.org/View/121375</guid>
    </item>
    <item>
      <title>EFFECT OF NATIVE MATERIALS ON ROADBUILDING IN OHIO</title>
      <link>https://trid.trb.org/View/121339</link>
      <description><![CDATA[THE NATIVE SOILS AND ROCKS HAVE A PROFOUND EFFECT ON HIGHWAY CONSTRUCTION IN OHIO. THE BOUNDARY BETWEEN THE APPALACHIAN PLATEAUS TO THE EAST AND THE CENTRAL LOWLANDS TO THE WEST PASSES NORTH AND SOUTH THROUGH THE CENTRAL PART OF THE STATE. THE BEDROCK CONSISTS ENTIRELY OF SEDIMENTARY STRATA INCLUDING MOSTLY LIMESTONES AND DOLOMITES IN THE WESTERN PART OF THE STATE AND OF SANDSTONE AND SHALES IN THE EASTERN PART. THE NORTHWESTERN THREE-FOURTHS OF THE STATE HAS BEEN SUBJECT TO CONTINENTAL GLACIATION. ROAD BUILDING AGGREGATES ARE OBTAINED PRINCIPALLY FROM THE LIMESTONE AND DOLOMITES OF THE CENTRAL AND WESTERN PART OF THE STATE AND FROM SANDS AND GRAVELS DEPOSITED EITHER DIRECTLY FROM THE ICE OR AS GLACIAL OUTWASH IN THE PRINCIPAL RIVER VALLEYS. THE SOILS ARE OF MAJOR IMPORTANCE IN HIGHWAY CONSTRUCTION IN OHIO. DUE TO THE SEVERAL GEOLOGIC PROCESSES WHICH HAVE BEEN AT WORK IN THE STATE A WIDE VARIETY OF SOIL TYPES ARE FOUND. TO AID IN INTERPRETING SOIL CONDITIONS AND THEIR EFFECT ON HIGHWAY CONSTRUCTION, AN ENGINEERING SOILS MAP HAS BEEN PREPARED COMBINING DATA PRESENTED ON A GENERALIZED PEDOLOGICAL SOIL MAP OF THE STATE, THE GEOLOGICAL MAP OF THE STATE AND THE CONSIDERABLE DATA ON THE ENGINEERING PROPERTIES OF OHIO SOILS WHICH HAS BEEN COMPILED BY THE OHIO STATE HIGHWAY TESTING AND RESEARCH LABORATORY DURING THE PAST 15 YEARS. GRANULAR SOILS WHICH PROVIDE GOOD SUPPORT TO PAVEMENT STRUCTURES ARE CONFINED PRINCIPALLY TO A FEW OLD GLACIAL LAKE BEACHES IN THE NORTHERN PART OF THE STATE AND TO SOME OF THE PRINCIPAL RIVER VALLEYS ELSEWHERE. THE PREDOMINATING SUBGRADE SOILS THROUGH MOST OF THE STATE ARE FINE GRAINED SILTY CLAY AND CLAY SOILS OF INTERMEDIATE TO LOW SUPPORTING STRENGTH. PAVEMENT DESIGN FOR THESE MATERIALS MUST TAKE INTO ACCOUNT THE STABILITY OF THE VARIOUS SOILS AS WELL AS THE VOLUME AND WEIGHT OF THE TRAFFIC WHICH MUST BE SUPPORTED. FOR ECONOMICAL CONSTRUCTION CAREFUL CONSIDERATION MUST BE GIVEN TO THE VARIOUS AVAILABLE POTENTIAL CONSTRUCTION MATERIALS. IN VIEW OF THE HIGH COST OF PAVEMENT CONSTRUCTION FOR MODERN DAY HEAVY COMMERCIAL TRAFFIC ON LOW STABILITY SOILS A THOROUGH KNOWLEDGE OF THE STATE'S SOILS AND OF AVAILABLE AGGREGATES OF SUITABLE QUALITY AND REASONABLE COST FOR PAVEMENT SURFACES, BASES AND SUBBASES IS OF UTMOST IMPORTANCE. /AUTHOR/]]></description>
      <pubDate>Sun, 15 Aug 2004 02:38:59 GMT</pubDate>
      <guid>https://trid.trb.org/View/121339</guid>
    </item>
    <item>
      <title>USE OF AGRICULTURAL SOIL MAPS IN MAKING SOIL SURVEYS</title>
      <link>https://trid.trb.org/View/121325</link>
      <description><![CDATA[THE USE OF THE PEDOLOGICAL SYSTEM OF CLASSIFICATION PERMITS EASY IDENTIFICATION OF SOILS AS TO TYPE, AND KNOWLEDGE OF THE CHARACTERISTICS OF VARIOUS SOIL TYPES AND PREVIOUS EXPERIENCE WITH THEM CAN BE UTILIZED IN PLANNING AND DESIGN. THE PEDOLOGICAL SYSTEM OF CLASSIFICATION CAN BE USED IN MAKING SOIL SURVEYS, ASSISTED BY A SOIL IDENTIFICATION KEY. THE USE OF AGRICULTURAL SOIL MAPS IS DESCRIBED BY THE NORTH CAROLINA STATE HIGHWAY DEPARTMENT AND A SOIL IDENTIFICATION KEY USED IN MAKING SOIL SURVEYS IS INCLUDED. THE USE OF THE KEY IS DESCRIBED.]]></description>
      <pubDate>Sun, 15 Aug 2004 02:38:56 GMT</pubDate>
      <guid>https://trid.trb.org/View/121325</guid>
    </item>
    <item>
      <title>PREPARATION OF SOIL STRIP MAPS FOR MICHIGAN STATE HIGHWAY PROJECTS</title>
      <link>https://trid.trb.org/View/121295</link>
      <description><![CDATA[METHODS AND PROCEDURES FOR PREPARING PEDOLOGICAL SOIL STRIP MAPS FOR PROPOSED HIGHWAYS IN MICHIGAN ARE DESCRIBED. AN EXPLANATION IS GIVEN TO THE ORGANIZATION, EDUCATION, AND TRAINING OF PERSONNEL WHO PERFORM THIS WORK AND THE RESPONSIBILITIES AND TYPES OF WORK PERFORMED BY MICHIGAN DISTRICT SOILS ENGINEERS ARE DESCRIBED. THE TYPES OF INFORMATION COLLECTED IN SOIL SURVEYS AND THEIR RELATION TO THE PLANNING, LOCATION, AND DESIGN OF HIGHWAYS ARE DISCUSSED. EXAMPLES OF SOIL TYPE DESCRIPTIONS, PEDOLOGICAL SOIL STRIP MAPS, DESIGN CHARTS, AND A RESISTIVITY-SURVEY PROFILE ARE ALSO INCLUDED. /AUTHOR/]]></description>
      <pubDate>Sun, 15 Aug 2004 02:38:48 GMT</pubDate>
      <guid>https://trid.trb.org/View/121295</guid>
    </item>
    <item>
      <title>USE OF PEDOLOGIC MAP IN A HIGHWAY SOIL SURVEY</title>
      <link>https://trid.trb.org/View/121294</link>
      <description><![CDATA[THIS PAPER BRIEFLY EXPLAINS THE METHOD OF PRODUCING SOIL STRIP MAPS BASED ON THE PEDOLOGIC (AGRICULTURAL) SYSTEM OF SOIL CLASSIFICATION AND THE INTERPRETATION OF AERIAL PHOTOGRAPHS, FOR PROPOSED HIGHWAYS IN ILLINOIS. IT DISCUSSES THE TYPES OF INFORMATION PRESENTED IN THE ENGINEERING SOIL REPORTS THAT ACCOMPANY THE STRIP MAPS AND THE WAY IN WHICH THEY ARE USED FOR HIGHWAY SOIL SURVEYS. EXAMPLES OF THE STRIP MAPS AND THE METHODS OF PRESENTING ENGINEERING SOIL DATA ARE INCLUDED. /AUTHOR/]]></description>
      <pubDate>Sun, 15 Aug 2004 02:38:48 GMT</pubDate>
      <guid>https://trid.trb.org/View/121294</guid>
    </item>
    <item>
      <title>A COMPARISON OF SOIL STRIP MAPS</title>
      <link>https://trid.trb.org/View/118926</link>
      <description><![CDATA[RESULTS OF A SUBSTUDY IN THE COMPREHENSIVE STUDY, SOIL EXPLORATION AND MAPPING /IHR-12/ ARE PRESENTED GIVING A DETAILED COMPARISON OF TWO SOIL STRIP MAPS PREPARED FOR A 5- MILE SECTION OF PROPOSED INTERSTATE HIGHWAY ALIGNMENT IN WOODFORD AND MCLEAN COUNTIES, ILLINOIS. ONE MAP WAS MADE BY AERIAL PHOTOGRAPHIC INTERPRETATION PROCEDURES UTILIZING 1'20,000 AND 1'9,600 SCALE PHOTOGRAPHY IN CONJUNCTION WITH AVAILABLE SOIL REPORTS, SOIL ASSOCIATION MAPS, AND GEOLOGIC INFORMATION. SUBSEQUENT TO THE COMPLETION OF THE AIRPORT MAP , A MAP WAS MADE BY A SOIL SCIENTIST USING STANDARD FIELD PROCEDURES OF AGRICULTURAL SOIL SURVEY. THE SURFICIAL DEPOSITS CONSIST OF GLACIAL TILL COVERED BY A LAYER OF LOESS OF VARIABLE THICKNESS. COMPARISON MAPS WERE PREPARED ON THE BASIS OF PEDOLOGIC SOIL SERIES, PROFILE DRAINAGE CHARACTERISTICS, GREAT SOIL GROUPS AND PARENT MATERIALS. THE DETAILED SOIL SURVEY STUDIES ON THE SELECTED ROUTE FOR HIGHWAY LOCATION AND PLANNING CONCLUDED' /1/ THE DETAIL SHOWN ON THE FIELD PEDOLOGIC MAP IS NOT NECESSARY, /2/ PARENT MATERIAL MAPS BY AIRPHOTO METHODS ARE GENERALLY ADEQUATE, BEING 75 TO 85 PERCENT ACCURATE WHERE THE GEOLOGY IS NOT EXCESSIVELY COMPLEX, AND /3/ THE AIRPHOTO MAPS COULD BE IMPROVED GREATLY BY A LIMITED AMOUNT OF FIELD WORK.]]></description>
      <pubDate>Sun, 15 Aug 2004 02:07:52 GMT</pubDate>
      <guid>https://trid.trb.org/View/118926</guid>
    </item>
    <item>
      <title>ENGINEERING USES OF THE SOILS</title>
      <link>https://trid.trb.org/View/118924</link>
      <description><![CDATA[THIS IS ONE OF A SERIES OF COUNTY SOIL SURVEYS BEING PREPARED BY THE U.S. DEPARTMENT OF AGRICULTURE, SOIL CONSERVATION SERVICE. THIS IS PART OF AN OVERALL PROGRAM IN WHICH COUNTY OR AREA SOIL SURVEYS, GENERALLY CONTAINING AN ENGINEERING SECTION AND A PEDOLOGICAL MAP ON A PHOTO-MOSAIC BASE, WILL BE PREPARED FOR MOST OF THE COUNTIES OF THE UNITED STATES. THE LAFAYETTE COUNTY, WISCONSIN SOIL SURVEY CONTAINS AN ENGINEERING SECTION ENGINEERING USES OF THE SOILS WHICH CONSISTS OF A TEXT, ENGINEERING TEST DATA, A BRIEF DESCRIPTION OF THE MAPPED SOILS, THEIR PHYSICAL PROPERTIES AND THE SUITABILITY AND CHARACTERISTICS OF THE SOILS /BPR/]]></description>
      <pubDate>Sun, 15 Aug 2004 02:07:49 GMT</pubDate>
      <guid>https://trid.trb.org/View/118924</guid>
    </item>
    <item>
      <title>ENGINEERING PROPERTIES OF SOILS</title>
      <link>https://trid.trb.org/View/118923</link>
      <description><![CDATA[THIS IS ONE OF A SERIES OF COUNTY SOIL SURVEYS BEING PREPARED BY THE U.S. DEPARTMENT OF AGRICULTURE, SOIL CONSERVATION SERVICE. THIS IS PART OF AN OVERALL PROGRAM IN WHICH COUNTY OR AREA SOIL SURVEYS, GENERALLY CONTAINING AN ENGINEERING SECTION AND A PEDOLOGICAL MAP ON A PHOTO-MOSAIC BASE, WILL BE PREPARED FOR MOST OF THE COUNTIES OF THE UNITED STATES. THE SOIL SURVEY REPORT FOR FOUNTAIN COUNTY, INDIANA CONTAINS AN ENGINEERING SECTION, ENGINEERING PROPERTIES OF SOILS, WHICH CONSISTS OF A TEXT, ENGINEERING TEST DATA, A BRIEF DESCRIPTION OF THE MAPPED SOILS, THEIR ESTIMATED PHYSICAL PROPERTIES AND THE ENGINEERING INTERPRETATION OF THE SOILS. /BPR/]]></description>
      <pubDate>Sun, 15 Aug 2004 02:07:47 GMT</pubDate>
      <guid>https://trid.trb.org/View/118923</guid>
    </item>
    <item>
      <title>USE OF SOILS FOR ENGINEERING</title>
      <link>https://trid.trb.org/View/118918</link>
      <description><![CDATA[THIS IS ONE OF A SERIES OF COUNTY SOIL SURVEY REPORTS BEING PREPARED AS PART OF AN OVERALL PROGRAM IN WHICH COUNTY OR AREA SOIL SURVEYS WILL BE PREPARED FOR MOST OF THE COUNTIES OF THE UNITED STATES. THESE SURVEY REPORTS WILL CONTAIN AN ENGINEERING SECTION AND A PEDOLOGICAL MAP ON A PHOTO-MOSAIC BASE. THE SOIL SURVEY REPORT FOR TIPPAH COUNTY, MISSISSIPPI, CONTAINS AN ENGINEERING SECTION, USE OF SOILS FOR ENGINEERING TEST DATA, A BRIEF DESCRIPTION OF THE MAPPED SOILS, THEIR ESTIMATED PHYSICAL PROPERTIES AND THE ENGINEERING INTERPRETATION OF THE SOILS.]]></description>
      <pubDate>Sun, 15 Aug 2004 02:07:39 GMT</pubDate>
      <guid>https://trid.trb.org/View/118918</guid>
    </item>
    <item>
      <title>PEDOTECHNICAL ASPECTS OF TERRAIN ANALYSIS</title>
      <link>https://trid.trb.org/View/189111</link>
      <description><![CDATA[Terrain analysis is defined as part of the process through which terrain is evaluated for specific land uses. The examples used in this paper concerns the environmental impacts of constructing low-volume roads on steep slopes in forest areas. The basic source of data for the terrain-mapping system described is the standard soil survey, which is already well established in most countries of the world. The paper describes interrelations between principles of pedological mapping and geotechnical analysis of slope stability. A soil survey map and its application to man-created slope failures (shallow translational and rotational failures) in British Columbia is used for illustration of the techniques involved. By analyses carried out in the field, the process of terrain analysis is used to extend and better communicate soil survey data to engineering problems. (Author)]]></description>
      <pubDate>Thu, 30 Jun 1983 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/189111</guid>
    </item>
    <item>
      <title>RETRIEVAL AND USE OF GEOTECHNICAL INFORMATION</title>
      <link>https://trid.trb.org/View/33800</link>
      <description><![CDATA[In an effort to furnish insights into the need for and benefits from investigations  and correlations of exploratory data (obtained from various sources including governmental agencies and private consulting firms), the acquisition and retrieval of such information is reviewed, the benefits from such a system are described, and an example is presented of geotechnical investigation and the collection of data.  Published information sources include technical publications of professional societies, government agencies (federal, state and local), and small groups such as university libraries.  Attention is focused on field investigations in specific localities and the pooling of information by concerned design professionals. The benefits to be gained through such cooperative effort is illustrated by a case history from Kentucky.  The details are outlined of the preliminary literature search, the bedrock geology is summarized and information on surficial soils was obtained form material published by the county soil survey.  The retrieval of field investigation data involved gaining access to files of exploration data (of exploration consultants) and boring logs (from the Metropolitan Sewer District and the State Bureau of Highways).  Field reconnaisance was then conducted to verify reported conditions and to investigate the division of the county into pedologically-derived soil areas.  The analysis and interpretation of data are briefly outlined. The importance is emphasized of field exploration, as well as the compilation of data from concerned professionals which would be readily accessible to interested individuals.]]></description>
      <pubDate>Wed, 10 Sep 1975 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/33800</guid>
    </item>
    <item>
      <title>AIRPORT RUNWAY EVALUATION IN CANADA, WITH DISCUSSION AND CLOSURE</title>
      <link>https://trid.trb.org/View/103523</link>
      <description><![CDATA[THIS PAPER OUTLINES THE RESULTS OF AN INVESTIGATION OF THE RUNWAYS AT A NUMBER OF CANADA'S PRINCIPAL AIRPORTS, WHICH WAS CONDUCTED DURING 1945 AND 1946. THE PROGRAM OF TESTING INCLUDED: A PEDOLOGICAL SOIL SURVEY AND THE PREPARATION OF A PEDOLOGICAL SOIL MAP FOR EACH AIRPORT SITE; FIELD MOISTURE AND DENSITY TESTS IN PLACE ON THE BASE COURSE AND ON EACH 6-IN. LAYER OF THE UPPER 18 TO 24 IN. OF THE SUBGRADE; SECURING LARGE DISTURBED SAMPLES OF BASE COURSE AND OF EACH LAYER OF SUBGRADE FOR PHYSICAL AND COMPACTION TESTS IN THE LABORATORY, AND UNDISTURBED SAMPLES FOR CBR (BOTH FIELD AND SOAKED CONDITION), TRIAXIAL COMPRESSION, SHEAR, AND CONSOLIDATION TESTS; CONE BEARING AND HOUSEL PENETROMETER TESTS ON LAYER OF SUBGRADE IN THE FIELD; PLATE BEARING TESTS (REPETITIVE) ON SUBGRADE, BASE COURSE, AND SURFACE, TO DETERMINE THE LOAD SUPPORTING VALUES OF THE RUNWAYS, AND TO OBTAIN INFORMATION REQUIRED FOR THE DESIGN OF EITHER RIGID OR FLEXIBLE PAVEMENTS. /AUTHOR/]]></description>
      <pubDate>Mon, 29 May 1972 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/103523</guid>
    </item>
    <item>
      <title>PEDOGENIC MATERIALS, THEIR ENGINEERING PROPERTIES AND DISTRIBUTION IN SOUTH AFRICA AND SOUTH WEST AFRICA</title>
      <link>https://trid.trb.org/View/121208</link>
      <description><![CDATA[PEDOGENIC MATERIALS OF ENGINEERING SIGNIFICANCE IN SOUTH AFRICA AND SOUTH WEST AFRICA ARE INTRODUCED. THE GENERAL CHARACTERISTICS AND PROBABLE MODES OF ORIGIN OF THE THREE IMPORTANT PEDOGENIC MATERIALS VIZ. CALCRETE, FERRICRETE AND SILCRETE ARE INDIVIDUALLY DESCRIBED. THEIR ENGINEERING PROPERTIES, AND PROBLEMS ASSOCIATED WITH THEIR USE IN HIGHWAY ENGINEERING AND AS A FOUNDATION MATERIAL ARE ALSO DISCUSSED. A MAP IS PRESENTED TO SHOW THE LIMITS OF DISTRIBUTION OF THESE MATERIALS IN SOUTH AFRICA AND SOUTH WEST AFRICA. /RRL/AUTHOR/]]></description>
      <pubDate>Tue, 16 Mar 1971 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/121208</guid>
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