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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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      <link>https://trid.trb.org/</link>
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    <item>
      <title>IMPORT PASSENGER AUTOMOBILE WEIGHT PROJECTIONS 1979-1986: MERCEDES-BENZ, BMW, VOLVO, BL LTD</title>
      <link>https://trid.trb.org/View/88741</link>
      <description><![CDATA[A preliminary analysis is presented for projecting curb weights of automobiles for four import manufacturers -- Mercedes-Benz, BMW, Volvo, BL Ltd. These manufacturers may have difficulties meeting U.S. fuel economy standards for the 1978 through 1985 model year period due to their limited offering of luxury and or sports vehicles with low fuel economy ratings. An overview of their product plans, financial and production status was developed from publicly available sources, highlighting fuel economy efforts. Even with expanded use of diesel engines (development of which is subject to stricter emissions standards) and turbochargers, substantial weight loss would probably be needed to meet legislated goals. An analysis of potential weight reduction through the mid-1980's was performed based on engineering analysis and the manufacturer's known product plans to the extent available. Individual manufacturer's strategies of weight loss due to (1) all new vehicle design, (2) major sheet metal change, and (3) component redesign and material substitution were formulated, drawn in part from weight reduction successes achieved by U.S. manufacturers. Results are presented at the detail level by manufacturer and model and at the summary level by series and EPA market class. Weight loss potentials from eleven to thirty-two percent (depending on vehicle size and engine type) were estimated from 1978-1986.]]></description>
      <pubDate>Wed, 28 Aug 2002 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/88741</guid>
    </item>
    <item>
      <title>WEIGHT REDUCTION POTENTIAL OF AUTOMOBILES AND LIGHT TRUCKS: 1979 SUMMARY SOURCE DOCUMENT</title>
      <link>https://trid.trb.org/View/150964</link>
      <description><![CDATA[The purpose of this report is to provide an assessment of the potential for weight reduction for passenger cars and light trucks (including pickup trucks, vans, and utility vehicles of GVWR up to 8500 pounds) in the 1980 to 2000 model year period. Various aspects of vehicular performance are addressed. Four weight reduction scenarios involving material substitution are presented with increasing technological sophistication. In addition to the baseline data, dominant case assessments for high strength steel, fiber reinforced plastic, aluminum, and hybrid reinforced plastics are provided.]]></description>
      <pubDate>Tue, 27 Aug 2002 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/150964</guid>
    </item>
    <item>
      <title>FORD FAIRMONT WEIGHT REDUCTION BASELINE DATA</title>
      <link>https://trid.trb.org/View/82596</link>
      <description><![CDATA[A weight study was conducted of the Ford Fairmont 4-door sedan with 4-cylinder engine and 4-speed manual transmission. The vehicle teardown was limited to the detail necessary to be useful to project near term weight reduction for automotive fuel economy studies. A complete parts list, which includes component description, quantity per car, total weight per car, material description, method of fabrication, and gauge thickness and photographs of the major components, are presented.]]></description>
      <pubDate>Fri, 12 Apr 2002 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/82596</guid>
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    <item>
      <title>DESIGN OF HOLLOW BOX GIRDERS WITHOUT TRANSVERSE BULKHEADS</title>
      <link>https://trid.trb.org/View/140851</link>
      <description><![CDATA[A method of designing a hollow girder without supporting transverse beams is described, which was applied to the design of the superstructure of two bridges which formed part of the A 11 /EB 8 junction at Leverkusen.  In accordance with a special proposal, the bridges were built as hollow box girders with internal formwork having no transverse beams.  This solution satisfies the demands for short construction time and low costs.  The article is supplemented by a comparison of the weight of this type of structure and that of the hollow girder stiffened by transverse bulkheads.]]></description>
      <pubDate>Tue, 05 Sep 2000 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/140851</guid>
    </item>
    <item>
      <title>VEHICLE WEIGHT CONTROL IN CHILE, A SUCCESSFUL EXPERIENCE</title>
      <link>https://trid.trb.org/View/538901</link>
      <description><![CDATA[Although the first vehicle weight controls began in Chile in 1965, the first systematic controls with portable equipment acquired in 1976 were beguan as recently as 1978.  In 1980, legislation establishing limits for eight types of axles and for vehicle overall weight was introduced.  While the equipment was being acquired and while some 13 established stations with adequate civil works were under construction, the portable equipment was set up in stations with a small infrastructure but which operated on a permanent basis.]]></description>
      <pubDate>Tue, 15 Sep 1998 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/538901</guid>
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    <item>
      <title>IMPACTS OF THE EXTENDED-WEIGHT COAL HAUL ROAD SYSTEM (INTERIM REPORT)</title>
      <link>https://trid.trb.org/View/573221</link>
      <description><![CDATA[The Extended-Weight Coal Haul Road System, created by Kentucky's Legislature in 1986, consists of all roads which carry over 50,000 tons (45,360,000 kg) of coal in a calendar year.  Trucks hauling coal on this system are authorized to exceed normal weight limits through the payment of annual decal fees.  A research study was initiated in July 1992 to analyze the impacts of the extended-weight system.  This interim report, prepared after one year of a three-year study, describes the analyses performed thus far and presents preliminary findings, recommendations, and a discussion of future work.  Analyses in this report are based on: historical data on coal production and transportation; data from coal decal applications; interviews of legislators, transportation officials, coal company representatives, and coal trucking representatives; newspaper articles; vehicle classification data; a pavement cost analysis; and accident data.]]></description>
      <pubDate>Sat, 09 Aug 1997 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/573221</guid>
    </item>
    <item>
      <title>VEHICLE SIZE AND WEIGHT REGULATIONS AND HIGHWAY INFRASTRUCTURE MANAGEMENT</title>
      <link>https://trid.trb.org/View/482314</link>
      <description><![CDATA[The author explains the relevance and important implications of regulations governing the sizes and weights of heavy vehicles in highway infrastructure management.  A method is presented for evaluating infrastructure impacts, trucking productivity, and highway cost-allocation implications of alternative truck weight limits and enforcement options.  A weight-prediction technique is used to resolve some major uncertainties from the regulatory standpoint with respect to input variables needed to provide the technical basis to support regulatory policy and infrastructure management decisions.  The regulations form the core of transport policies related to trucking productivity, infrastructure provision, and management.  Any revisions in the size and weight limits are reflected in truck fleet, operating weights, and volumes, which in turn affect the infrastructure geometric requirements, loadings, maintenance, and rehabilitation intervention levels.  The proposed evaluation method permits regulatory and weight-control policies to be developed that are compatible with existing infrastructure capabilities.]]></description>
      <pubDate>Thu, 17 Apr 1997 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/482314</guid>
    </item>
    <item>
      <title>AUTOMATIC BATCH PLANTS</title>
      <link>https://trid.trb.org/View/97145</link>
      <description><![CDATA[THE EXPERIENCE OF NEW YORK STATE WITH AUTOMATIC BATCH PLANTS IS DISCUSSED. THE FACTORS WHICH INFLUENCED THE FORMULATION OF THE QUALITY ASSURANCE PROGRAM WERE THE REQUIREMENT FOR DOCUMENTATION, AVAILABILITY OF NEW ENGINEERING AND EQUIPMENT TECHNOLOGY, AND THE LIMITATION OF INSPECTION MANPOWER. A RESEARCH PROGRAM WAS INITIATED TO FURNISH INFORMATION ON UNIFORMITY OF PRODUCTION, NEW SPECIFICATIONS AND PRODUCT CONTROL PROCEDURE, AND AUTOMATION AND RECORDING. CONSIDERATIONS COMMON TO ALL AUTOMATIC BATCH PLANTS ARE IDENTIFIED AS: (1) THE SCALE AND CONTROL SYSTEM, (2) THE INTERLOCKING OVER AND UNDERWEIGHT CONTROLS, AND (3) THE RECORDING. THE PLANTS HAVE PROVIDED MORE UNIFORM MIXTURES, BETTER PLANT CONTROL, REDUCED COSTS AND INCREASED PRODUCTION.]]></description>
      <pubDate>Thu, 02 Jun 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/97145</guid>
    </item>
    <item>
      <title>TAXATION MODEL FOR ROAD VEHICLES IN SAUDI ARABIA</title>
      <link>https://trid.trb.org/View/365613</link>
      <description><![CDATA[A taxation model for road vehicles in the Kingdom of Saudi Arabia has been developed on the hypothesis that vehicles should pay their fair share for roadway maintenance.  A number of load- and traffic-counting stations were selected on the main highway network in the Eastern Province of the kingdom.  Representative ranges of truck loads and dimensions, traffic volumes, and pavement deterioration were monitored at these stations.  Data related to kilometers traveled per day were also collected on the basis of driver interviews.  At all survey stations, a large number of trucks were found to exceed the load and dimensional limits of the Ministry of Communication.  The pavement condition survey indicated a prevalence of load-associated damage. Assuming pavement maintenance costs for major and routine maintenance operations, a model to assess vehicle taxation in terms of an annual tax as well as a load violation charge is presented with illustrative examples.  As a result of this study, 11 weight control stations have been installed on major truck routes in the kingdom.  Early results of the weight control program are encouraging.]]></description>
      <pubDate>Thu, 30 Apr 1992 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/365613</guid>
    </item>
    <item>
      <title>LIGHT WEIGHT, HIGH FIELD, STABLE, SUPERCONDUCTING MAGNETS FOR ADVANCED TRANSPORTATION SYSTEMS</title>
      <link>https://trid.trb.org/View/361833</link>
      <description><![CDATA[Although the Guideway may be the most expensive component of a MAGLEV system, the importance of a suitable magnet system should not be underestimated.  The reliability of operation of MAGLEV depends on the superconducting magnets performing to their specifications in a reliable manner (i.e., without training or quenching).  Besides reliability the magnets should produce high field, be sufficiently stable to withstand reasonable perturbations, be light weight, be protected in the event of a quench, and be economical (although performance should outweigh cost).  We propose to develop superconducting magnets that have these features. Our magnet designs are based on internally cooled, cable-in-conduit superconductor with Polymer Matrix Composites (PMC) as the structural reinforcement.  Although the initial work is with metallic superconductors such as NbTi, the processes being developed will be applicable to the high Temperature Ceramic Superconductors when they become suitable for magnet applications.]]></description>
      <pubDate>Sat, 29 Feb 1992 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/361833</guid>
    </item>
    <item>
      <title>DEVELOPMENT OF AN ADVANCED FAN BLADE CONTAINMENT</title>
      <link>https://trid.trb.org/View/310106</link>
      <description><![CDATA[The objective  of this fan blade containment study was to investigate potential weight savings using a ceramic-based blade containment system.  Technology developed to provide light-weight armor for aircraft and aircrew members has shown that systems using ceramics (Al2O3, SlC, and B4C) are more weight efficient than metals (steel, titanium, and aluminum), or polymer fibers (fiberglass and Kevlar).  The study consists of three primary sub-tasks:  1.  Design a ceramic-based fan blade containment system to achieve maximum possible weight effectiveness.  2. Compare the ceramic containment system with current metal and Kevlar systems to quantify the potential weight improvement and corresponding cost impact.  3.  Develop a test plan, including the design of test fixtures and test articles to allow verification of improved weight effectiveness of ceramic-based systems.]]></description>
      <pubDate>Fri, 31 Aug 1990 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/310106</guid>
    </item>
    <item>
      <title>INTERNATIONAL DEVELOPMENT IN TRAILER DESIGN</title>
      <link>https://trid.trb.org/View/285189</link>
      <description><![CDATA[A brief presentation is made of the latest developments in international trailer design.  The factors affecting design and the resulting contribution in the trailer industry in meeting new demands are generally discussed, with particular reference to weight saving solutions with the aid of computers and new technologies, aerodynamic developments and safety and stability considerations.  For the covering abstract of the conference see IRRD 288720.  (Author/TRRL)]]></description>
      <pubDate>Sun, 31 May 1987 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/285189</guid>
    </item>
    <item>
      <title>AS CARS GET SMALLER, DESIGNING FOR SAFETY GETS TOUGHER</title>
      <link>https://trid.trb.org/View/203486</link>
      <description><![CDATA[Maintaining strength, stiffness, and crashworthiness properties of cars while simultaneously reducing their size and weight is a major challenge facing automobile manufacturers today.  To meet this challenge, they are turning increasingly to improved and new materials that are stronger and lighter; to structural optimization techniques that use computers to determine the lightest possible structures for cars; and to improved crash testing, either simulated or real.  With structural crashworthiness, the structure is designed to undergo only one loading.  That is, the structure is sacrificed during an accident or collision to save the occupants and cargo.  This means that the mechanical properties during both the elastic and plastic range of the material are of major concern to the structural design engineer.  Materials used in the front and rear structures must provide excellent energy absorption throughout the complete deformation of the vehicle.  On the other hand, materials used in the passenger compartment structure must exhibit high strength properties with a somewhat more limited range of deformation and with correspondingly less emphasis on their energy absorption properties.  High-strength steel grades, up to eight times stronger than mild carbon steels, are used to produce thinner, lighter components.]]></description>
      <pubDate>Thu, 28 Jun 1984 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/203486</guid>
    </item>
    <item>
      <title>WEAK ROCK: SOFT, FRACTURED AND WEATHERED ROCK. PROCEEDINGS OF THE INTERNATIONAL SYMPOSIUM ON WEAK ROCK HELD TOKYO, SEPTEMBER 21-24 1981. VOLUMES 1, 2 &amp; 3 (CONTD)</title>
      <link>https://trid.trb.org/View/198145</link>
      <description><![CDATA[(continued from TRIS 382007).  Stress Analysis in the Weak Surrounding Rock and Lining Treated as Multiconcentric Rheological Media (Weishen, Z and Shiwei, B); A Numerical Analysis of Tunnelling in Soft Rocks (Kamemura, K and Kimura, H); Effects of Existing Tunnel on the Stress Distribution of New Tunnel Lining (Ito, T and Hisatake, M); Three Dimensional Model Tests on Soft Ground Tunnels (Konda, T, Inokuma, A and Kanto, K); Stresses and Deformations Around Tunnel Face in Soft Rock (Kobayashi, S, Tamura, T, Nishimura, N and Mochida, Y); The Effect of Lateral Stress Changes Around a Borehole in Shale During Plugging on Plug Adequacy (Olsen, JM); Stable Excavation for Water Intake Shaft in Weathered Rocks with Fractured Zone (Yamazaki, Y, Matsuzawa, T, Hosoi, T and Tomatsu, Y); Outline on Rock Pressure and Support for Roadways Built in Weak Swelling Strata (Wenguang, L); Research on Rock Pressure and Support of Roadways in Weak Rock (Xizhou, N); Design of Cut Slopes Preventing Tensile Failure in a Pyroclastic Flow Deposit "Shirasu" (Yamanouchi, T, Gotoh, K and Murata, H).  (continued on TRIS 382009).  (TRRL)]]></description>
      <pubDate>Mon, 30 Apr 1984 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/198145</guid>
    </item>
    <item>
      <title>MID 80S CARS: SAVING WEIGHT AT ALL COSTS</title>
      <link>https://trid.trb.org/View/194331</link>
      <description><![CDATA[This article reviews the concept vehicle Project VERA, developed by Peugeot in response to the express wish of the French Agency for Energy Savings. VERA is a laboratory vehicle aimed at the study of factors which contribute to fuel savings. The principal factors considered are drag, weight, and fuel efficiency. The target is to achieve fuel consumption at least 25% below that of the medium size model, the Peugeot 305. Operation Saville, the fiberglass Cadillac in which the weight of the body and chassis are reduced by 37% is also reviewed briefly as well as composite torsion bars.]]></description>
      <pubDate>Thu, 30 Jun 1983 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/194331</guid>
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