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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>Subsurface Multi-Utility Asset Location Tool</title>
      <link>https://trid.trb.org/View/1470928</link>
      <description><![CDATA[A fully integrated and commercially available acoustic pipe locator (APL) was used in a series of local area and real-world field tests under various soil conditions and field environments. Various operating modalities and test parameters were used in validating the overall APL system performance. The pipe locating system performed very well and was very easy to operate. The preliminary APL system performance was validated and tested in the controlled and simulated field settings – indoor and outdoor pipe beds. A wide range of real-world utilities – gas mains and service lines, electrical conduits, water mains, and sewer drains and laterals – were surveyed and located under concrete, asphalt, gravel, topsoil, and grassy coverings during the field trials. The field test results showed very good system performance and robustness in overall system operation. A total of more than two hundred (200+) real-world test locations were surveyed in Northern California and Indiana areas. Overall, the average pipe detection accuracy of the APL system is well within 9". The APL detection system is able to resolve multi-utilities with spacing less than 15" for the stepping distance of 6". In general, the accuracy of the overall system detection performance was well above 80% for the detection criteria of ±18". The test results have been validated by utility markers, mapping information, and visual inspection methods. Although there were some minor operating malfunctions during the field trials, the APL system was able to recover from these minor glitches.]]></description>
      <pubDate>Mon, 03 Jul 2017 11:58:10 GMT</pubDate>
      <guid>https://trid.trb.org/View/1470928</guid>
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      <title>Acoustic-based Technology to Locate Buried Pipes</title>
      <link>https://trid.trb.org/View/1471381</link>
      <description><![CDATA[The objective of this project is to build a pre-commercial device, improve its performance to detect multiple buried pipes, and evaluate the pre-commercial device at utility sites. In the past, Gas Technology Institute (GTI) and SoniVerse Inc. (SVI) with support from Operations Technology Development, NFP (OTD) have developed an acoustic-technology-based technology to detect buried natural gas pipes, with emphasis on detecting buried polyethylene (PE) pipes. The concept is to send the acoustic signal into the ground and detect the reflected signal from the pipe at ground level. The device has been referred to as Emulator, and was successfully tested in the laboratory and at several utility locations under a variety of field conditions to detect both metal and PE pipes buried up to 5 feet. The Emulator consists of a laptop computer, off-the-shelf data acquisition module, high power class D amplifier, deep cycle car battery, and exchangeable sensor modules. The work conducted under this U.S. Department of Transportation, Pipeline and Hazardous Materials Safety Administration (DOT/PHMSA) project improved/developed and built an integrated, hand-held device – pre-commercial unit – to detect buried pipes. The integrated device was successfully tested at several field sites. The detection of buried natural gas pipes, especially PE pipe, will assist the gas industry and pipe locator companies to locate pipes before excavations/construction. This will reduce the third party damages to the underground utilities, increase safety of the natural gas distribution system, and reduce gas industry operating costs.]]></description>
      <pubDate>Mon, 03 Jul 2017 11:58:07 GMT</pubDate>
      <guid>https://trid.trb.org/View/1471381</guid>
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      <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>STUDY OF ALERTING AND LOCATING TECHNIQUES AND THEIR IMPACT (SALTTI). HIGH SEAS COST-BENEFIT ANALYSES. VOLUME 2. SYSTEMS AND COST-BENEFIT METHODOLOGY</title>
      <link>https://trid.trb.org/View/69781</link>
      <description><![CDATA[Contents: Candidate Systems; High Seas; Cost-Benefit Methodology; Systems Parameters; Geographic Parameters; and System Parameter Data Sheets.]]></description>
      <pubDate>Fri, 14 Jun 2002 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/69781</guid>
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      <title>NEW CONCEPTS FOR THE LOCATION OF UNDERGROUND PLASTIC NATURAL GAS PIPES. FINAL REPORT, JULY 1994-DECEMBER 1995</title>
      <link>https://trid.trb.org/View/465948</link>
      <description><![CDATA[The primary objective of this investigation is to develop a system which will detect and locate plastic pipe from 1/2 inch (12.7 mm) to 4 inch (101.6 mm) or more in diameter in all soils, in all conditions, to a depth of 4 feet (1.22 m).  In order to develop an instrument for locating buried plastic pipe, Folsom Research, Inc. proposed to investigate (1) ultra-wideband swept-frequency microwave radar, (2) chirp ultrasound for use in soils where the radar attenuation is too high, and (3) ultra-high-speed signal processing.]]></description>
      <pubDate>Thu, 04 Dec 1997 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/465948</guid>
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      <title>IDENTIFICATION OF PLASTIC PIPE LOCATION TECHNOLOGY THROUGH A FEDERAL LABORATORY RESEARCH AND DEVELOPMENT CONTEST. TOPICAL REPORT, MARCH 15, 1993-DECEMBER 31, 1996</title>
      <link>https://trid.trb.org/View/572731</link>
      <description><![CDATA[Electromagnetic locators cannot locate plastic pipe unless a conductor, tracer wire, is buried near the pipe and brought to the surface for signal injection.  Wire shifting or damage reduces this type of locator effectiveness.  This program's objective was to see if any current Federal laboratory technology can locate buried plastic pipe better than tracer wire.  A second objective was to determine how to identify Federally developed technology and transfer it to the gas industry.]]></description>
      <pubDate>Mon, 21 Jul 1997 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/572731</guid>
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      <title>A TRAVEL TIME BASED INDEX FOR EVALUATING CONGESTION</title>
      <link>https://trid.trb.org/View/481585</link>
      <description><![CDATA[The growth of traffic congestion on our streets and highways is a major national concern. Despite its pervasive nature, however, there are few consistent definitions and systematic measures of congestion. This paper describes a congestion index that is keyed to the differences in actual versus desired travel times for various roadways. A series of indices are developed for each major type of roadway on a continuous scale that depicts the amount of congestion incurred. The paper also shows how the indices can be applied to quantify congestion along typical streets, by time period and location. The index is easy to use, understand and apply by both technical and non-technical audiences.]]></description>
      <pubDate>Mon, 10 Mar 1997 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/481585</guid>
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      <title>GLOBAL POSITIONING SYSTEMS</title>
      <link>https://trid.trb.org/View/470816</link>
      <description><![CDATA[Inexpensive Global Positioning System (GPS) receivers and mapping programs are new tools that are especially handy for streamlining notices of excavation to one-call centers. These tools provide a means for excavators to accurately determine the exact location of a hard-to-describe dig site and communicate it to facility operators by way of the one-call center. A $300 receiver provides an accurate location based on signals from GPS satellites orbiting the earth. A $500 computer program will take GPS information, either typed in, or by direct hookup to a GPS receiver, and show the location on a map displayed on the computer screen. This allows a facility operator to quickly determine whether there are facilities near the dig site that need to be marked.]]></description>
      <pubDate>Tue, 04 Feb 1997 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/470816</guid>
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    <item>
      <title>1997 BUYERS GUIDE</title>
      <link>https://trid.trb.org/View/464444</link>
      <description><![CDATA[The 1997 Buyers Guide contains three sections.  The index of suppliers contains all the vendors manufacturing a specific product or providing a particular service.  Each listing is indexed by products and services it markets.  The supplier listing has more than 700 manufacturers, consultants, distributors listed alphabetically.  Phone number, mailing address and fax number is provided for each supplier for conventional contact.  Additionally, e-mail and the World Wide Web addresses are provided.  The vehicle specifications section contains details on up to three of the latest models from vehicle manufacturers.  Information is provided on engine type, seating capacity, available accessibility equipment, body construction and more.  Also provided is the latest list of vehicles that have been tested by the Federal Transit Administration's Altoona, PA bus testing facility.]]></description>
      <pubDate>Sun, 15 Sep 1996 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/464444</guid>
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    <item>
      <title>FUSION OF TWO ELECTROMAGNETIC FIELD SENSOR TECHNOLOGIES FOR APPLICATION TO THE LOCATION OF BURIED GAS PIPES. ANNUAL REPORT NO. 1, JULY 1, 1994-JUNE 30, 1995</title>
      <link>https://trid.trb.org/View/454904</link>
      <description><![CDATA[This report describes work accomplished in the first year of a project to develop a practical pipe locator tool for both plastic and metal pipe.  Efforts in the first year focused on showing separately the feasibility of both the GPR and Eddy current (EC) technologies to locate pipes.  The ground penetrating radar (GPR) used for demonstration of feasibility was an FM-CW radar system operating the VHF and UHF ranges.  In moderate-loss soils, images were produced on 4-inch (10 cm) polyethylene (PE) pipe down to 3 feet (.9 m); 2-inch (5 cm) PE pipe could be damaged to 2 feet (.6 m).  With the EG technology, the edges of backfilled pipe trenches are detectable, and plastic pipes could be detected at shallow depths in high conductivity soils.]]></description>
      <pubDate>Wed, 08 May 1996 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/454904</guid>
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    <item>
      <title>THE TRANSPORTATION WORLD-WIDE-WEB INDEX</title>
      <link>https://trid.trb.org/View/454894</link>
      <description><![CDATA[The internet and the world-wide-web make an ever increasing amount of information readily available on an ever growing variety  of subjects.  To deal with this large amount of information, several search resources are available to the general public for use free of charge.  The most pressing problem that has resulted from the availability of this vast amount of information is the means of finding the truly useful sources. This report was designed to allow the transportation professional to take advantage of all that is available. This index provides information on 200 transportation-related web-sites.  In assembling this report, a long list of resources on the world-wide-web was compiled.  A survey was then sent out to transportation-related sites.  In cases where managers of the sites responded to the survey, the information was added to the information compiled on each site.  The index is divided into two sections: the first section consists of a table providing detailed information on each site - the table can be used as an index to quickly scan which sites provide information on a particular area of transportation; the second section provides a page of information on each site.]]></description>
      <pubDate>Wed, 01 May 1996 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/454894</guid>
    </item>
    <item>
      <title>ACCIDENT RECONSTRUCTION MASTER INDEX</title>
      <link>https://trid.trb.org/View/457708</link>
      <description><![CDATA[This comprehensive index is compiled from several periodicals and books on the field of accident reconstruction. This index is a regular feature of every Fall issue of Accident Investigation Quarterly. Next year's edition will be expanded to include brand new books, periodicals and federal research reports. Due to space constraints abbreviations were used.]]></description>
      <pubDate>Wed, 14 Feb 1996 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/457708</guid>
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    <item>
      <title>RT&amp;S TRACK BUYER'S GUIDE</title>
      <link>https://trid.trb.org/View/413798</link>
      <description><![CDATA[This is the second annual Track Buyer's Guide prepared by the editors of Railway Track and Structures.  This issue provides updates in the following critical areas of track structure: rail, ties, ballast, fastening systems, turnouts, lubrication, grade-crossing surfaces, contact rail and catenary systems and track inspection.  A new section covering fall-protection equipment has been added.  The improved and expanded directory section includes providers of products, equipment and services relating to track construction and maintenance on freight and passenger railways.  Additionally, the issue contains an 18-month index to articles appearing in RT&S.]]></description>
      <pubDate>Tue, 15 Nov 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/413798</guid>
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    <item>
      <title>AMERICAN CITY &amp; COUNTY 1994 MUNICIPAL INDEX</title>
      <link>https://trid.trb.org/View/389789</link>
      <description><![CDATA[This index is considered to be the only complete purchasing guide for local governments.  Categories for city and township needs are listed alphabetically, and companies are included with addresses and telephone numbers.  A professional services directory provides a guide to expert engineers and consultants. The section on suppliers helps locate companies serving local government markets.  An extensive list is also provided of who's who in administration in cities, townships and villages with populations of 10,000 or more.  An advertisers index is provided which is referenced by the categories of products and services they provide.]]></description>
      <pubDate>Tue, 12 Apr 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/389789</guid>
    </item>
    <item>
      <title>THE IVHS INDEX</title>
      <link>https://trid.trb.org/View/388672</link>
      <description><![CDATA[Waters Information Services has tapped into its vast experience publishing industry newsletters and research reports to create a comprehensive directory to the IVHS industry.  The Index includes over 300 detailed profiles of IVHS vendors, systems integrators, subsystem suppliers, consultants and engineering firms.  it provides immediate access to key company contacts, IVHS products, relevant sales figures and on-going project activity. In addition, the report lists key IVHS contacts at federal and state DOTs and other agencies as well as professional and trade associations active in the field.  Published annually, the Index is an up-to-date service that insures the reader to keep the expanding scope of the IVHS industry in focus.  Future editions will include European and Pac Rim profiles.]]></description>
      <pubDate>Mon, 28 Mar 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/388672</guid>
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