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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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    <item>
      <title>MAINTAINABILITY METHODOLOGY AND PROCEDURES</title>
      <link>https://trid.trb.org/View/41436</link>
      <description><![CDATA[This report sets forth techniques for the application of maintainability programs to contracts. It develops means of establishing maintainability criteria and maintenance concepts and philosophy. Analysis techniques, tradeoff procedures are also given. Evaluation procedures with general checkoff tests are given as guides for evaluation of proposal and maintainability programs. An appendix contains a generalized maintainability specification geared to the handbook and the procurement type envisioned.]]></description>
      <pubDate>Sun, 23 Jun 2002 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/41436</guid>
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      <title>MOBILE PARAMETRIC MEASUREMENT DEVICE. VOLUME I: OPERATION. (USERS MANUAL)</title>
      <link>https://trid.trb.org/View/162111</link>
      <description><![CDATA[The objective of this program was to design, construct, and validate a mobile device for measuring vehicle parameters necessary for an accurate prediction of the vehicle's handling characteristics. As a result of this program, a Mobile Parametric Measurement Device (MPMD) was constructed, and test procedures validated.  The report is of three users manuals--Volume I, Operation; Volume II, Test Procedures; maintenance), test procedures, and data reduction procedures of the MPMD.]]></description>
      <pubDate>Fri, 19 Nov 1982 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/162111</guid>
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    <item>
      <title>MOBILE PARAMETRIC MEASUREMENT DEVICE. VOLUME II: TEST PROCEDURES. (USERS MANUAL)</title>
      <link>https://trid.trb.org/View/162112</link>
      <description><![CDATA[The objective of this program was to design, construct, and validate a mobile device for measuring vehicle parameters necessary for an accurate prediction of the vehicle's handling characteristics. As a result of the program, a Mobile Parametric Measurement Device (MPMD) was constructed, and test procedures validated.]]></description>
      <pubDate>Fri, 19 Nov 1982 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/162112</guid>
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    <item>
      <title>MOBILE PARAMETRIC MEASUREMENT DEVICE. VOLUME III: DATA REDUCTION PROCEDURES. (USERS MANUAL)</title>
      <link>https://trid.trb.org/View/162113</link>
      <description><![CDATA[The objective of this program was to design, construct, and validate a mobile device for measuring vehicle parameters necessary for an accurate prediction of the vehicle's handling characteristics.  As a result of the program, a Mobil Parametric Measurement Device (MPMD) was constructed, and test procedures validated.]]></description>
      <pubDate>Fri, 19 Nov 1982 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/162113</guid>
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    <item>
      <title>LONGITUDINAL RAIL PROFILOMETER</title>
      <link>https://trid.trb.org/View/144071</link>
      <description><![CDATA[The patent application describes a portable apparatus for use in measuring vertical deviation of the surface of a rail from a reference plane. The measuring device includes a pair of guide beams and a hand-powered carriage which move along the beams. A sensor, which follows undulations resulting from rail wear, is mounted on the carriage and is coupled to the pen of a recorder.]]></description>
      <pubDate>Wed, 27 Feb 1980 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/144071</guid>
    </item>
    <item>
      <title>TRANSPONDER PERFORMANCE ANALYZER (TPA)</title>
      <link>https://trid.trb.org/View/143766</link>
      <description><![CDATA[The purpose of this document is to describe the Transponder Performance Analyzer (TPA) used for measurement of aircraft beacon transponder performance characteristics. The system was developed at NAFEC utilizing both 'in-house' designed and commercially available equipment. The system is fully self-supporting, is housed in a mobile bus, and has been used for ramp testing of transponders operating in general aviation aircraft and for bench testing of 'off-the shelf' units. (Author)]]></description>
      <pubDate>Wed, 30 Jan 1980 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/143766</guid>
    </item>
    <item>
      <title>SAFEGUARDING THE BLADES</title>
      <link>https://trid.trb.org/View/91513</link>
      <description><![CDATA[Eighty three accidents between 1975 and 1977 involving propeller failure included 48 cases of blade of separation. It is noted that almost all of them could have been prevented if more attention were given by pilots to the propeller's condition during preflight examinations.  The dynamic and vibratory stresses acting on the propeller, and the causes of blade fatigue and failure are explained. Examination for airworthiness, annual inspections, repairing and replacement are discussed.  The maintenance of records of where and when maintenance was done is important.  Hints for avoiding accidents are noted.]]></description>
      <pubDate>Tue, 31 Jul 1979 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/91513</guid>
    </item>
    <item>
      <title>FLIGHT INSPECTION: HOW TO ACHIEVE MAXIMUM CAPABILITY WITH MINIMUM INVESTMENT</title>
      <link>https://trid.trb.org/View/85657</link>
      <description><![CDATA[The Corporacion Centroamericana de Servicios de Navegacion Aerea (COCESNA) flight inspection capability is described. The need for a new flight inspection aircraft is identified along with the effort expended in the planning and selection process.]]></description>
      <pubDate>Wed, 25 Apr 1979 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/85657</guid>
    </item>
    <item>
      <title>PASSENGER VEHICLE TIRE INSPECTION EQUIPMENT DEVELOPMENT. VOLUME I: SUMMARY REPORT</title>
      <link>https://trid.trb.org/View/77832</link>
      <description><![CDATA[Nondestructive tire testing techniques have been developed and the resultant technology enhancement has been incorporated into a prototype machine capable of performing on-vehicle tests of passenger vehicle tires with respect to three parameters: carcass integrity, inflation pressure, and tread depth. Carcass integrity determinations are made by exciting the tire with a random forcing function (bandwidth 100-400 Hz) and measuring the sidewall response as the tire rotates between displacement transducers. The random noise concept is shown to be superior to using a sinusoidal forcing function at a particular frequency. A temperature and pressure compensating inflation pressure control device has been developed. The device consists of an instrumented chuck and a control system capable of calculating the equivalent tire pressure at 72F, comparing it to a preset value, and adjusting the tire pressure as necessary to the set cold pressure point. A passover tread depth device has been produced. The device is basically a feeler gage, with 400 probes over a 10-inch distance which extend to engage the tire as it passes over the head plate. The travel of the probe results in a change in capacitance, and a processing circuit calculates a tread profile for each tire. These elements were incorporated into a prototype inspection machine intended for use in an automated vehicle inspection facility.]]></description>
      <pubDate>Sat, 03 Feb 1979 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/77832</guid>
    </item>
    <item>
      <title>PASSENGER VEHICLE TIRE INSPECTION EQUIPMENT DEVELOPMENT. VOLUME II: TECHNICAL REPORT</title>
      <link>https://trid.trb.org/View/77858</link>
      <description><![CDATA[Nondestructive tire testing techniques have been developed and the resultant technology enhancement has been incorporated into a prototype machine capable of performing on-vehicle tests of passenger vehicle tires with respect to three parameters: carcass integrity, inflation pressure, and tread depth.]]></description>
      <pubDate>Sat, 03 Feb 1979 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/77858</guid>
    </item>
    <item>
      <title>AVIONICS AND AVIATION SUPPORT EQUIPMENT BRAZIL</title>
      <link>https://trid.trb.org/View/57571</link>
      <description><![CDATA[The market research was undertaken to study the present and potential US share of the market in Brazil for avionics and aviation support equipment; to examine growth trends in Brazilian end-user industries over the next few years; to identify specific product categories that offer the most promising export potential for US companies; and to provide basic data which will assist US suppliers in determining current and potential sales and marketing opportunities. The trade promotional and marketing techniques were also reviewed.]]></description>
      <pubDate>Wed, 27 Dec 1978 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/57571</guid>
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    <item>
      <title>INDIA MARKET RESEARCH REPORT ON AVIONICS AND AVIATION SUPPORT EQUIPMENT</title>
      <link>https://trid.trb.org/View/57572</link>
      <description><![CDATA[The market research was undertaken to study the present and potential US share of the market in India for avionics and aviation support equipment; to examine growth trends in Indian end-user industries over the next few years; to identify specific product categories that offer the most promising export potential for US companies; and to provide basic data which will assist US suppliers indetermining current and potential sales and marketing opportunities. The trade promotional and marketing techniques were also reviewed.]]></description>
      <pubDate>Wed, 27 Dec 1978 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/57572</guid>
    </item>
    <item>
      <title>A STUDY OF THE MARKET FOR AVIONICS AND AVIATION SUPPORT EQUIPMENT IN SINGAPORE</title>
      <link>https://trid.trb.org/View/56581</link>
      <description><![CDATA[The market research was undertaken to study the present and potential US share of the market in Singapore for avionics and aviation support equipment; to examine growth trends in Singapore end-user industries over the next few years; to identify specific product categories that offer the most promising export potential for US companies; and to provide basic data which will assist US suppliers in determining current and potential sales and marketing opportunities. The trade promotional and marketing techniques were also reviewed.]]></description>
      <pubDate>Sun, 29 Oct 1978 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/56581</guid>
    </item>
    <item>
      <title>ON-BOARD VEHICLE SENSOR TECHNOLOGY. VOLUME II. TECHNICAL REPORT</title>
      <link>https://trid.trb.org/View/56660</link>
      <description><![CDATA[Forty three areas were identified in the brake, steering, suspension, tire, lighting and signalling systems where safety or inspection benefits might be obtained through the application of on-board vehicle sensors utilizing either on-board or off-board readout. These areas were screened against a variety of criteria, the most important being their potential for accident reduction as determined in the Indiana Tri-Level Studies in Accident Causation. Eleven areas were judged to warrant detailed evaluation of implementation considerations. These eleven candidate areas were then subjected to further analysis including identification of: currently available hardware, existing techniques for sensor application, conceptual devices where hardware does not now exist, and improvements possible in existing devices. In addition, a cost benefit analysis was performed for each candidate area, utilizing estimates of sensor life-cycle cost and benefit, including both safety and other impacts. These results are preliminary in nature, due to the weakness of the data bases in all important areas. Limited consideration was also given to alternative countermeasures in each area. Four candidate areas are judged to offer the potential of a favorable benefit/cost ratio. These are brake performance, tire tread depth, brake lights and brake friction material.]]></description>
      <pubDate>Sun, 29 Oct 1978 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/56660</guid>
    </item>
    <item>
      <title>ON-BOARD VEHICLE SENSOR TECHNOLOGY. VOLUME I. SUMMARY REPORT</title>
      <link>https://trid.trb.org/View/51001</link>
      <description><![CDATA[Forty three areas were identified in the brake, steering, suspension, tire, lighting and signalling systems where safety or inspection benefits might be obtained through the application of on-board vehicle sensors utilizing either on-board or off-board readout. These areas were screened against a variety of criteria, the most important being their potential for accident reduction as determined in the Indiana Tri-Level Studies in Accident Causation. Eleven areas were judged to warrant detailed evaluation of implementation considerations. These eleven candidate areas were then subjected to further analysis including identification of: currently available hardware, existing techniques for sensor application, conceptual devices where hardware does not now exist, and improvements possible in existing devices. In addition, a cost benefit analysis was performed for each candidate area, utilizing estimates of sensor life-cycle cost and benefit, including both safety and other impacts. These results are preliminary in nature, due to the weakness of the data bases in all important areas. Limited consideration was also given to alternative countermeasures in each area. Four candidate areas are judged to offer the potential of a favorable benefit/cost ratio. These are brake performance, tire tread depth, brake lights and brake friction material.]]></description>
      <pubDate>Thu, 31 Aug 1978 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/51001</guid>
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