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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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      <title>DEMONSTRATION PROJECT NO. 34: CATHODIC PROTECTION FOR REINFORCED CONCRETE BRIDGE DECKS, WOODINVILLE INTERCHANGE BRIDGE NO. 522/30ES. POST CONSTRUCTION REPORT, AUGUST 1985</title>
      <link>https://trid.trb.org/View/273480</link>
      <description><![CDATA[A slotted cathodic protection system was installed on the ES ramp in the Woodinville Interchange in the summer of 1985. The slotted cathodic protection system involves sawing 3/4" by 3/4" slots longitudinally in the existing deck at one-foot centers.  Platinum wire or carbon strand wire is placed in the cut slots first and then conductive polymer is filled in the slots.  Electric power from a rectifier supplies current to the wire and conductive polymer.  The current then flows to the top mat reinforcing steel, giving the steel protection from further corrosion.  Some problem areas were identified.  A more positive method of finding grounding locations from the anode to rebar nicks, ties, etc. needs to be developed. Perhaps an instrument can be used to supplement visual inspection.  The necessity for having a minimum of 1/2-inch cover from the bottom of the slot to the top of the rebar needs to be resolved.  A better method of installing the conductive polymer needs to be developed.  Hand-spreading of the material from plastic bags results in sloppy work.  Procurement time for the rectifier needs to be shortened.  Since the project, once it has started, moves along very rapidly, there is very little time for on-the-job training of workers.  Workmen should have prior experience at this work.  In remote areas, sources of electrical power may not be available.  It will be necessary for sources of power, such as solar panels or long-lasting batteries to be developed for this system.  These problems need to be overcome to obtain a better quality product.]]></description>
      <pubDate>Wed, 31 Dec 1986 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/273480</guid>
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      <title>IMPROVING MATERIALS AND METHODS FOR INSTALLING INDUCTIVE LOOP DETECTORS. FINAL REPORT</title>
      <link>https://trid.trb.org/View/273496</link>
      <description><![CDATA[This report is the final report of this research project. It describes a compiling of materials utilized by various agencies for use in formation of inductive loop detectors. It further lists methods by which different agencies install materials in order to obtain a resilient detection system. Tested were loop sealants, loop wire, preformed loops and loop sawslot cleanout methods.  Included is a "Results of Survey" chart depicting materials and methods used by eight states.  It was found that though many different materials and methods are used to form inductive detector loops, there exist some major problems.  These are, most commonly, loop sealant failure (loss of adhesion) and poor installation technique (inadequately cleaned sawslots).]]></description>
      <pubDate>Wed, 31 Dec 1986 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/273496</guid>
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      <title>SLOTTED LEFT TURN BAYS AT SIGNALIZED INTERSECTIONS</title>
      <link>https://trid.trb.org/View/192832</link>
      <description><![CDATA[Although the use of slotted left-turn bays has become an increasingly popular design as a replacement for parallel left-turn bays in Alberta, little is known with respect to the efficiency of this new design.  The research work presented in this study more discreetly analyzes and evaluates the role and function of slotted left-turn bays in order to aid decision makers in determining those situations where slotted left-turn bays will be most cost effective and efficient.  The three main objectives of this study were to review the history and current use of slotted left-turn bays in both Canada and the United States; complete a limited data collection and analysis program in order to determine the effectiveness of slotted left-turn bays with respect to intersection capacity and safety benefits; develop a set of guidelines for the installation of slotted left-turn bays based upon the findings of the first two objectives.  (TRRL)]]></description>
      <pubDate>Wed, 29 Feb 1984 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/192832</guid>
    </item>
    <item>
      <title>EXOTIC METHODS</title>
      <link>https://trid.trb.org/View/52826</link>
      <description><![CDATA[The state of the art and future research on methods and testing of disintegrating rock are examined.  Rocks are removed by four basic mechanisms: Mechanically induced stress, thermal spalling, fusion, and chemical reactions. Future research in this field should be aimed at combining the use of new rock-disintegration devices with conventional disk and roller cutters.  By using new devices to slot the rock and conventional cutters to remove the unsupported rock, the advancement rate of tunnel borers could possibly by increased by a factor of 2 or 3.  Proposed new techniques for cutting slots in the rock such as high pressure water jets, lasers, electron beams and the subterrene fussion device should be tested on small-diameter tunneling machines to determine their true potential for tunneling.  Further testing should be done with the high-energy impact devices and new explosive tunneling devices should also be tested. Lastly if break throughs are made on the power outputs of focused heat sources such as lasers or electron beams, they should be tested on conventional tunnel borers to assist the mechanical cutters.]]></description>
      <pubDate>Thu, 13 Oct 1977 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/52826</guid>
    </item>
    <item>
      <title>MUFFLER HAVING TWO PARALLEL BORES WITH SLOTTED BAFFLES</title>
      <link>https://trid.trb.org/View/132351</link>
      <description><![CDATA[This muffler for an internal-combustion engine is die cast in two clamshell-like halves.  The muffler consists of two parallel tubes each having 11 slotted baffles in series. Specific dimensions are given for various engine sizes.--JAG]]></description>
      <pubDate>Tue, 22 Oct 1974 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/132351</guid>
    </item>
    <item>
      <title>DEVICE FOR SILENCING GAS FLOW STREAMS</title>
      <link>https://trid.trb.org/View/132352</link>
      <description><![CDATA[Three embodiments of a muffler design are described in which two chambers are used in series, connected by a frustroconical or venturi-shaped tube.  Various slots and/or apertures are used in the inlet and outlet tubes and center baffle.--JAG]]></description>
      <pubDate>Tue, 22 Oct 1974 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/132352</guid>
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    <item>
      <title>EXHAUST SILENCING SYSTEM</title>
      <link>https://trid.trb.org/View/132353</link>
      <description><![CDATA[This is a dual system for a particular V-8 automotive engine intended to especially attenuate a 125-Hz resonance.  The system consists essentially of two separate gas conduits, each of which carries a front and rear silencing section. The silencing sections are formed of larger-diameter tube crimped to form silencer ends and baffles.  An expansion chamber, sidebranch chambers, and a chamber in which a restriction in the main gas tube causes some flow through a parallel path are used in each side.--JAG]]></description>
      <pubDate>Tue, 22 Oct 1974 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/132353</guid>
    </item>
    <item>
      <title>SCALE MODEL STUDIES OF STRATA MOVEMENT AROUND MINE ROADWAYS: PART 1, THE DEPENDENCE OF ROADWAY CLOSURE UPON ROCK STRENGTH; PART 2, THE EFFECT OF DINTING; PART 3, THE EFFECT OF SLOTTING A SOLID RIB</title>
      <link>https://trid.trb.org/View/124091</link>
      <description><![CDATA[THIS THREE PART PAPER DEALS WITH THE THEORY, EXPERIMENTAL TECHNIQUE, AND RESULTS OF SCALE MODEL STUDIES ASSOCIATED WITH THE APPLICATION OF ROCK MECHANICS TO UNDERGROUND MINING PROBLEMS. THE USEFULNESS OF SUCH MODEL TECHNIQUES IS AT PRESENT CONTROVERSIAL. SOME INVESTIGATORS IN THE ROCK MECHANICS FIELD STRONGLY SUPPORT THIS TECHNIQUE AND EVEN RELY ON IT FOR DESIGN PURPOSES, OTHERS CONDEMN IT AS BEING EITHER UNREALISTIC IN THAT IT IS IMPOSSIBLE TO MODEL TRULY THE FIELD STRUCTURE AND THE IN SITU STRESSES, OR THEY FEEL THAT IT IS TOO EXPENSIVE AS AN EVERYDAY TOOL. ASIDE FROM THIS CONTROVERSY, WHICH MAY NEVER REALLY BE RESOLVED, THIS REVIEWER FEELS THE WRITER HAS DEVELOPED A USEFUL EXPERIMENTAL FACILITY AND HAS CARRIED OUT A SERIES OF EXCELLENT STUDIES USING IT. THE EXPERIMENTAL RESULTS OBTAINED IN MANY CASES ARE OBSERVED IN ACTUAL FIELD SITUATIONS, AND THE MODEL RESULTS OBTAINED USING ARTIFICIAL SUPPORTS, DINTING, AND SLOTTING WILL BE USEFUL, AT LEAST QUALITATIVELY, IN STUDYING SIMILAR MINING TECHNIQUES UNDERGROUND. /AMR/]]></description>
      <pubDate>Sun, 25 Apr 1971 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/124091</guid>
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