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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>Painting by Numbers</title>
      <link>https://trid.trb.org/View/1426438</link>
      <description><![CDATA[In order to fully repaint the steel girders on the Oresund Bridge, the 8km-long bridge which links Denmark and Sweden, automated painting systems are being developed. There are several challenges for this major project, including repainting the two top coats over an open sea, with trains running inside the girder, highway traffic running on top, within short range of a 26,000V cable, as well as obstacles to work around, such as installations and escape stairs. Solutions to these challenges are presented in this article.]]></description>
      <pubDate>Fri, 21 Oct 2016 16:32:38 GMT</pubDate>
      <guid>https://trid.trb.org/View/1426438</guid>
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      <title>Corrosion Check</title>
      <link>https://trid.trb.org/View/1427075</link>
      <description><![CDATA[Enabling rust to be detected from 100m away, technology originally developed for use in the heritage industry is expected to transfer to the bridge inspection sector within the next two years. It is predicted that tens of millions of dollars per year could be saved in surveying costs, as well eliminating the necessity of potentially-hazardous inspections. The technology involves the use of a remote imaging system that performs a combination of both 3D and spectral-imaging and is being developed through a project in the UK. The resulting 3D models and spectral images would inform decisions about when to repair or decomission bridges by providing detailed information regarding surface blistering and corrosion.]]></description>
      <pubDate>Fri, 21 Oct 2016 16:32:38 GMT</pubDate>
      <guid>https://trid.trb.org/View/1427075</guid>
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      <title>Reference Route</title>
      <link>https://trid.trb.org/View/1427083</link>
      <description><![CDATA[Now that the Federal Highway Administration (FHWA) has acquired four automated robotic inspection tools (Robotic Assisted Bridge Inspection Tools, known as the Rabit) for its long-term bridge performance initative, bridge data collection on a national basis is expected to kick off in earnest in 2017. In order to assist in the understanding of bridge deterioration and performance, the FHWA aims to collect data from a representative sample of bridges nationwide. The Rabit is capable of deploying a number of nondestructive evaluation technologies simultaneously, such as ground-penetrating radar, high-resolution imaging, electrical resistivity measurements, impact echo and ultrasonic surface wave technology.]]></description>
      <pubDate>Fri, 21 Oct 2016 16:32:33 GMT</pubDate>
      <guid>https://trid.trb.org/View/1427083</guid>
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      <title>Going Underground</title>
      <link>https://trid.trb.org/View/1427087</link>
      <description><![CDATA[A new system based on ground-penetrating radar can be used to carry out detection of deterioration on bridge decks, as explained in this article. As many bridges in Europe are structurally deficient or functionally obsolete, with national budgets insufficient to meet maintenance demands, diagnostic tools are crucial to providing an early warning of construction faults and deterioration before the tragedy of bridge collapse occurs. Ground-penetrating radar (GPR) is a non-destructive method that has a number of advantages over other available non-destructive inspection methods and is well-suited to prioritization for budgeting purposes, as GPR data is quantitative and readings are not affected by noise. One of two of the most common types of GPR for bridge surface measurement uses air-launched antennae, which can collect data even when travelling at more than 100km/h (unlike its counterpart, which uses ground-coupled antennae), and it is located at a safe distance from the surface.]]></description>
      <pubDate>Fri, 21 Oct 2016 16:32:33 GMT</pubDate>
      <guid>https://trid.trb.org/View/1427087</guid>
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      <title>Hidden strengths</title>
      <link>https://trid.trb.org/View/1426437</link>
      <description><![CDATA[Ways in which to overcome the current limitations of advanced composites for bridge strengthening are being investigated in a research program led by Chalmers University of Technology in Sweden, as  presented in this article. A fiber-reinforced polymer 'sandwich' has the potential to extend the life of existing structures, while minimizing the disruption that deck replacement entails.]]></description>
      <pubDate>Fri, 21 Oct 2016 16:32:29 GMT</pubDate>
      <guid>https://trid.trb.org/View/1426437</guid>
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      <title>Critical Mass</title>
      <link>https://trid.trb.org/View/1427080</link>
      <description><![CDATA[Highly suitable for monitoring fracture-critical bridges, wireless sensors also provide additional benefits, as detailed in this article. Fracture-critical bridges are defined as having one or more steel members in tension whose failure would lead to partial or complete collapse of the bridge. While bridge replacement is often not possible, due to costs and other consequences, these bridges are at risk of fatigue, corrosion and violation of bridge load rating. Early detection of structural problems is crucial to ensure public safety. Multi-sensor devices can be used to concurrently monitor strain, temperature and tilt on the structural members of highway bridges.]]></description>
      <pubDate>Fri, 21 Oct 2016 16:32:29 GMT</pubDate>
      <guid>https://trid.trb.org/View/1427080</guid>
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      <title>Flying Start</title>
      <link>https://trid.trb.org/View/1427074</link>
      <description><![CDATA[The relaxation of the Federal Aviation Administration (FAA)'s rules on commercial unmanned aerial vehicles (UAVs) in the USA and their impacts on bridge inspection are explored in this article. The Minnesota Department of Transportation (MnDOT) has undertaken a project that originally started with the intention of evaluating the safety and effectiveness of UAVs as a potential alternative to aerial work platforms or rope access for inspections, in an effort to address the increasing costs of bridge inspections. The project has expanded into three phases, and the ways in which the FAA's rules are applicable are explored.]]></description>
      <pubDate>Fri, 21 Oct 2016 16:32:23 GMT</pubDate>
      <guid>https://trid.trb.org/View/1427074</guid>
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    <item>
      <title>Stealthy Health Watch</title>
      <link>https://trid.trb.org/View/1427086</link>
      <description><![CDATA[Bridge bearings with integrated structural health monitoring are now offering improved functionality, enabling them to optimally address diverse purposes, as demonstrated by a bridge monitoring program in Switzerland. A main road that connects the towns of Thusis and Tiefencastel in the southern canton of Graubunden passes alongside a mountain in an area of unstable soil conditions, with soil continually moving due to erosion. It is an ongoing challenge to to ensure the safety of the four bridges that are founded above the slippage plane there, and as such, new bearings were installed that were equipped with integrated pressure sensors, as well as a cable connection point to enable portable monitoring equipment to be attached for reading and recording data.]]></description>
      <pubDate>Fri, 21 Oct 2016 16:32:15 GMT</pubDate>
      <guid>https://trid.trb.org/View/1427086</guid>
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      <title>Showing the way</title>
      <link>https://trid.trb.org/View/1363243</link>
      <description><![CDATA[Satellite monitoring may be routinely used in the not-too-distant future to help bridge engineers prioritize and plan bridge maintenance. It is usually the responsibility of the chief bridge engineer to monitor a structure's health, along with organizing and prioritizing routine maintenance, as well as issuing safety warnings. In order to help provide a clearer picture, a consortium led by the University of Nottingham in the UK (the Geo SHM Consoritum - GNSS & Earth Observation for Structural Health Monitoring) worked with the operator of the Forth Road Bridge in east central Scotland to develop a system to monitor bridges using space assets, such as satellites. The results of the first phase of the consortium's work is reported in this article.]]></description>
      <pubDate>Fri, 31 Jul 2015 17:59:45 GMT</pubDate>
      <guid>https://trid.trb.org/View/1363243</guid>
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      <title>Access all areas</title>
      <link>https://trid.trb.org/View/1363237</link>
      <description><![CDATA[A central focus in the design of Los Angeles' new Sixth Street Viaduct and its surrounds was how pedestrians experience it, despite its main role as a highway bridge. As one of LA's most recognizable bridges, it extends more than a kilometer in the downtown area of the city and serves as a vital transportation link, as well as a cultural icon. Retaining the emotional connection that residents felt for their bridge when it came time to replace it proved to be one of the primary challenges. How that challenge was overcome is presented here.]]></description>
      <pubDate>Fri, 31 Jul 2015 17:59:45 GMT</pubDate>
      <guid>https://trid.trb.org/View/1363237</guid>
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    <item>
      <title>The Data Game</title>
      <link>https://trid.trb.org/View/1363455</link>
      <description><![CDATA[In order to ensure that structural health monitoring (SHM) systems provide optimal benefit for bridge owners and that there is standardization of data storage systems and ownership, long term strategies are required. With many players in the instrumentation world that accompanies SHM, the proper overall perspective is crucial. The decision must be made whether to hire a system provider to propose the SHM system or to turn to a research institution; and in terms of data storage, the answer is not any clearer, with a multitude of formats and servers available. Technologies must be reviewed and standards developed for SHM systems, with an urgent need for data formatting standards, data storage standards and agreements between owners and suppliers. SHM should be considered a long term strategy to provide a better understanding of the real world behavior of structures, not as a way of getting instant results.]]></description>
      <pubDate>Fri, 31 Jul 2015 17:59:44 GMT</pubDate>
      <guid>https://trid.trb.org/View/1363455</guid>
    </item>
    <item>
      <title>Performing Arts</title>
      <link>https://trid.trb.org/View/1363234</link>
      <description><![CDATA[While not normally associated with bridge design criteria, theatricality was a central requirement in the creation of the opening bridge in Merchant Square in Paddington, West London - a footbridge that is part of a development based around a new waterside garden square. The design of the bridge was the result of a complex form-finding process which optimizes multiple interwoven geometric, structural and other technical parameters resulting in a lean, cost-effective and efficient outcome. The effect of an opening action similar to a Japanese hand fan was created using a 3m-wide cantilevering deck hinged at its north end and raised using hydraulic jacks. Details of the construction of the footbridge are presented here.]]></description>
      <pubDate>Fri, 31 Jul 2015 17:59:43 GMT</pubDate>
      <guid>https://trid.trb.org/View/1363234</guid>
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    <item>
      <title>Level crossing</title>
      <link>https://trid.trb.org/View/1363241</link>
      <description><![CDATA[The stress-inducing dynamic forces associated with slight level changes as a vehicle crosses an expansion joint are investigated by an Austrian/Swiss research project, as well as the ways in which these forces can be minimized.]]></description>
      <pubDate>Fri, 31 Jul 2015 17:59:43 GMT</pubDate>
      <guid>https://trid.trb.org/View/1363241</guid>
    </item>
    <item>
      <title>Bearing fruit</title>
      <link>https://trid.trb.org/View/1363242</link>
      <description><![CDATA[Typically many times higher than the initial cost of supply and installation, the life-cycle cost of bridge bearings must not be neglected in the selection and specification process. While this notion is accepted when it comes to the overall construction of bridges, it is not commonly considered in relation to the bridge's individual key components, such as bearings. The ways in which the life-cycle costs can be minimized, through implementing a long-term strategy, are discussed here.]]></description>
      <pubDate>Fri, 31 Jul 2015 17:59:43 GMT</pubDate>
      <guid>https://trid.trb.org/View/1363242</guid>
    </item>
    <item>
      <title>Model Behaviour</title>
      <link>https://trid.trb.org/View/1352235</link>
      <description><![CDATA[Both the complexities of the process and the issue of software interoperability are explained as they relate to building information modelling (BIM) and its increased usage in the bridge sector. Three-dimensional virtual models with live views are becoming the standard, as opposed to a set of paper-based projection drawings. BIM has a major role in each of the phases of the design/build process: planning, schematic design, design development, construction documentation, bidding, construction phase and lifecycle. The example of the design for the New Citadella Bridge in Alessandria, Italy is used to illustrate the issues discussed.]]></description>
      <pubDate>Thu, 30 Apr 2015 09:24:55 GMT</pubDate>
      <guid>https://trid.trb.org/View/1352235</guid>
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