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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>ALL CHANGE AS RAIL ENGINEERS FACE TOUGH CHALLENGES</title>
      <link>https://trid.trb.org/View/500012</link>
      <description><![CDATA[This article describes the changes taking place in the railroad industry throughout Europe, with an emphasis on Britain. Interfleet Technology, in Britain, was created from the former InterCity Fleet Engineering Group which was responsible for the specification, procurement and maintenance of such trains such as the 140 mph (225 km/h) InterCity 225 (IC225) for the London-Edinburgh East Coast main line, which have led the world in high-speed trains running on existing tracks. In the long-term, the survival of the railroad business will depend on strategic decisions in an industry where technical advance has never been more rapid.]]></description>
      <pubDate>Thu, 08 Apr 1999 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/500012</guid>
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      <title>THE DEVELOPMENT OF ELECTRIC RAILWAY PROPULSION SYSTEMS</title>
      <link>https://trid.trb.org/View/500013</link>
      <description><![CDATA[The author describes the recent history of electric rail propulsion at Mitsubishi Electric. The historical evolution from dc to ac systems was necessary to meet several important needs: (1) comfort - passengers should enjoy a smooth, quiet ride. (2) environment - when chopper control was the main method of control, freon gas was widely used as a coolant. This has now been replaced by non-CFC coolants. (3) maintenance - it is not only necessary to provide low frequency maintenance but also simplicity so that any necessary work can be achieved quickly and at low cost.]]></description>
      <pubDate>Thu, 08 Apr 1999 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/500013</guid>
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      <title>A PARTNERSHIP THAT FREES OUR CITIES FROM FUMES AND GRID-LOCK</title>
      <link>https://trid.trb.org/View/500014</link>
      <description><![CDATA[This article examines international efforts to decrease emissions pollution from transit vehicles. The focus is on Volvo's partnerships with a number of European and South American cities to contain transit air pollution. For example, Curitiba, Brazil joined Volvo in the development of a bi-articulated bus with a passenger capacity of 175, which has decreased automobile congestion. Since 1993, Volvo has been supplying natural gas-drive (CNG) buses to cities and towns in Sweden, as well as supplying liquid petroleum (LPG) models to customers abroad. On June 1, 1996, Sweden's three largest cities introduced inner-city control zones, to which only vehicles complying with strict emission control standards will be admitted.]]></description>
      <pubDate>Thu, 08 Apr 1999 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/500014</guid>
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      <title>GREEN LIGHT GIVEN FOR COMMUNICATIONS REVOLUTION</title>
      <link>https://trid.trb.org/View/500015</link>
      <description><![CDATA[This article describes how railway signaling restrictions are being replaced by the technological solutions of today and tomorrow. Vital processors now control increasingly complex interlocking plants, processing more information for both operations and maintenance, using much less physical hardware than possible with the traditional systems. Traditional railway signaling is based on defined sections of track or "fixed blocks". The U.S. is on the verge of implementing true high-speed passenger rail systems. In other parts of the world high-speed systems operate exclusively on dedicated rights-of-way. In taking an incremental approach to high-speed rail, signal systems will need to accommodate a widening set of maximum authorized speeds.]]></description>
      <pubDate>Thu, 08 Apr 1999 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/500015</guid>
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    <item>
      <title>GET ON BOARD -- AND STAY IN TOUCH WITH THE FUTURE</title>
      <link>https://trid.trb.org/View/500016</link>
      <description><![CDATA[This article describes the operation of the SELTRAC automatic train control system based on the moving block principle. The system uses continuous train-to-wayside communication techniques to extract maximum performance from the vehicle and the guideway. Continuous monitoring and control of all vehicles on the system allows instant on-line adjustment of the optimum distance between trains. In addition to reduced headways, this continuous communication with each vehicle provides such advantages as: control of the complete speed profile; enforcement of temporary speed restrictions; full bi-directional operation without additional wayside hardware; and central monitoring of sub-systems.]]></description>
      <pubDate>Thu, 08 Apr 1999 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/500016</guid>
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      <title>HIGH TECH RADIO COULD BENEFIT LOW USE RAIL ROUTES</title>
      <link>https://trid.trb.org/View/500017</link>
      <description><![CDATA[This article explains how a high technology radio communications system can provide railway operators with a powerful, flexible and cost effective way to replace open wire communications systems. Point to multipoint radio access technology provides the means to develop optimum solutions for railways operators who are also looking for a way to deploy new systems integrating signaling and communications. Traffic analysis and network planning is a pre-requisite to ensure the proper dimensioning of the system for each of the communications services and applications, avoiding the risk of eventually blocking the system.]]></description>
      <pubDate>Thu, 08 Apr 1999 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/500017</guid>
    </item>
    <item>
      <title>U.K. RAIL SIGNALING SYSTEMS NEED FIRM DECISIONS -- NOW</title>
      <link>https://trid.trb.org/View/500018</link>
      <description><![CDATA[This article discusses railway signaling technology in the United Kingdom that can help reduce costs on little-used railroad lines; can increase capacity in dense suburban areas; introduce high-speed trains; and detect their presence. The use of single processor interlockings with direct feeds, fail safe time division multiplexers (TDM) linked to small panels or visual display units (VDUs) are being evaluated. Other topics discussed are high-speed train automatic train protection (ATP); the problems of train detection; and technology development options.]]></description>
      <pubDate>Thu, 08 Apr 1999 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/500018</guid>
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      <title>GET AROUND TOWN WITH INTELLIGENT SYSTEMS ON BUSES</title>
      <link>https://trid.trb.org/View/500019</link>
      <description><![CDATA[This article reports on the growing interest among public transit operators in the new intelligent fleet management systems (IFMS). An IFMS is a fully-integrated real-time information system. It is a comprehensive suite of mobile communications, electronics and software intended to enhance the performance of transit operations, with many benefits to passengers and transit departments. The IFMS uses a relational database system to store all real-time information and create reports. In the U.S. the move toward IFMS is growing, with municipalities issuing requests for proposals for fleets ranging in size from 30 to more than 2,000 vehicles.]]></description>
      <pubDate>Thu, 08 Apr 1999 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/500019</guid>
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    <item>
      <title>INTEGRATED TRANSIT COMMUNICATION AND INFORMATION SYSTEMS</title>
      <link>https://trid.trb.org/View/500020</link>
      <description><![CDATA[This article discusses the use of integrated circuit and microprocessor technology in information and communication systems for mass transit operations. Communication systems now contain radio interfaces and controls, crew intercom capability, passenger emergency intercommunications, co-ordinated voice and visual announcements, and direct broadcast from central control to the on-board PA system. Automatic voice announcements identify stations and caution passengers about moving doors, using automatic gain control and digital voice techniques to improve intelligibility under varying noise conditions.]]></description>
      <pubDate>Thu, 08 Apr 1999 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/500020</guid>
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      <title>RAILS MOVE ON -- FROM SLOW TO FAST AND THEN TO GRASS</title>
      <link>https://trid.trb.org/View/500021</link>
      <description><![CDATA[This article discusses new rail systems, where tracks will be built into existing roadway as the infrastructure forms a substantial part of total capital costs. The principles discussed are relevant to existing systems upgrading or replacing tracks. New rail systems in urban areas will seek to use, as far as possible, existing rights of way to minimize the need for demolition and disruption.]]></description>
      <pubDate>Thu, 08 Apr 1999 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/500021</guid>
    </item>
    <item>
      <title>USING CONCRETE RAILWAY SLEEPERS TO CONQUER STRESS</title>
      <link>https://trid.trb.org/View/500022</link>
      <description><![CDATA[A block sleeper is defined as a block of stone or concrete which supports a single rail. A twin block sleeper consists of two blocks linked by a metal bar, which support and tie both rails of the track. Pre-tensioned, pre-stressed concrete sleepers, first introduced more than 50 years ago, now account for 35 million sleepers on British Rail tracks and many more throughout the world. This article explains how concrete railway sleepers function and what the future developments are.]]></description>
      <pubDate>Thu, 08 Apr 1999 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/500022</guid>
    </item>
    <item>
      <title>PASSENGERS ARRIVE AT THE SUPERHIGHWAY CROSSROADS</title>
      <link>https://trid.trb.org/View/500023</link>
      <description><![CDATA[This article describes the latest technology in advanced passenger information systems for public transit in Europe. For instance, an integrated information system has the following requirements: (1) multimedia mapping - such as GIS or CD-ROM-based systems; (2) multimodal journey planners - on-line database to give timetable and fares information. (3) en route reassurance - departures and arrivals information, based on vehicle tracking systems, with real-time displays at intermediate stops. Many of these facilities are available today, but their introduction has been patchy and localized.]]></description>
      <pubDate>Thu, 08 Apr 1999 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/500023</guid>
    </item>
    <item>
      <title>THE INTELLIGENT WAY TO MOVE AROUND THE SYSTEM</title>
      <link>https://trid.trb.org/View/500024</link>
      <description><![CDATA[This article looks at the ways that information technology is being employed to control movement, guarantee safety and maintain reliability in transport networks. Audio systems in trains, such as ISYTRAC, provide high performance digital announcing that is easy to understand. The warning signals heard upon doors closing is a special class of audio information and can be automatically produced. On board information aids which can be controlled by transit staff fall into two groups: (1) those controlling the spontaneously occurring audio communication; (2) those controlling the programmed digital functions.]]></description>
      <pubDate>Thu, 08 Apr 1999 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/500024</guid>
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    <item>
      <title>NETWORKED CALL CENTERS -- THE TOTAL SERVICE SOLUTION</title>
      <link>https://trid.trb.org/View/500000</link>
      <description><![CDATA[This article describes the operations of a call center and how it can effectively satisfy customers and the company's competitive standing. Having a professional call center also puts a company in a much stronger position through the ability to piggy-back telemarketing activities. It enables direct customer contact, lets the company expand the information content of the associated database, and shifts the support burden from retail outlets. Customers also receive a higher level of service through a single point of contact.]]></description>
      <pubDate>Wed, 07 Apr 1999 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/500000</guid>
    </item>
    <item>
      <title>EURO VISION SIGNALS FUTURE FOR HIGH-SPEED CONNECTIONS</title>
      <link>https://trid.trb.org/View/500001</link>
      <description><![CDATA[The author examines the issues which are contributing to future developments of high-speed rail projects throughout Europe. Political, financial and technical issues have all fallen into place. It is believed that investment in new railways will accelerate over the next few years. This will be led by the construction of the European High-Speed Network and by an increased investment in city rail systems, particularly in Asia.]]></description>
      <pubDate>Wed, 07 Apr 1999 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/500001</guid>
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