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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>
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    <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>NATIONAL CONFERENCE ON RAIL-HIGHWAY GRADE CROSSING SAFETY PROCEEDINGS</title>
      <link>https://trid.trb.org/View/109007</link>
      <description><![CDATA[CONTENTS: SPEAKERS WELCOME, WILLIAM N. CAREY, JR. GRADE CROSSING SAFETY - A JOINT RESPONSIBILITY, WILLIAM B JOHNSON KEYNOTE ADDRESS, CARLTON C. ROBINSON FEDERAL GOVERNMENT ACTIVITY IN GRADE CROSSING SAFETY INTERAGENCY RELATIONS - BETWEEN PUBLIC AGENCIES INTERAGENCY RELATIONS - BETWEEN PUBLIC AND PRIVATE AGENCIES WHAT'S NEW CONCERNING GRADE CROSSING SAFETY FROM RESEARCH WHAT'S NEW CONCERNING GRADE CROSSING SAFETY FROM INDUSTRY ADMINISTRATION OF GRADE CROSSING PROGRAMS: WORKSHOP A TRAFFIC OPERATIONS AT GRADE CROSSINGS: WORKSHOP B PAYOFFS IN GRADE CROSSING PROGRAMS: WORKSHOP C ACCIDENT REPORTS AND INVESTIGATION: WORKSHOP D ENFORCEMENT: WORKSHOP E WORKSHOP SUMMARIES PROGRESS IN GRADE CROSSING SAFETY EULOGY OF JOSEPH H. HAYS, WILLIAM E. LOFTUS.]]></description>
      <pubDate>Thu, 22 Sep 1994 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/109007</guid>
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      <title>LOW-CLEARANCE VEHICLES AT GRADE CROSSINGS</title>
      <link>https://trid.trb.org/View/361847</link>
      <description><![CDATA[A literature review revealed there are no general highway design standards aimed at providing adequate ground-clearance on highways.  Similarly, there was a lack of data relative to the magnitude of the low-clearance vehicle incident problem and on low-clearance vehicle characteristics.  Low-clearance vehicles, including heavy trucks plus light trucks and automobiles with trailer combinations, comprised 2 percent of the traffic stream. Based on the field data, a design low-clearance vehicle was proposed whose dimensions are a 36-ft wheelbase and 5-inch ground clearance.  These represent the 85th percentile of the low-clearance vehicle dimensions collected. Microcomputer software was developed to simulate the movement of trucks over high roadways so that any highway engineer can analyze low-clearance problems.]]></description>
      <pubDate>Sat, 29 Feb 1992 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/361847</guid>
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      <title>CROSSING PROGRAM FACES CHALLENGES</title>
      <link>https://trid.trb.org/View/354259</link>
      <description><![CDATA[The year 1991 is shaping up as a tough one for the railroaders, suppliers and other people involved in the campaign for improved safety at railroad-highway grade crossings.  Proposals to include Federal grade crossings safety funds  in general block grants threaten to kill program that has saved thousands of lives.  The program's supporters are fighting hard to retain categorical funding, but recognize a tough fight ahead.]]></description>
      <pubDate>Fri, 31 May 1991 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/354259</guid>
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      <title>NTSB URGES RAIL CROSSING IMPROVEMENT AFTER CITING DRIVER IN CALIF. CRASH</title>
      <link>https://trid.trb.org/View/352749</link>
      <description><![CDATA[Improved highway warning devices at railway grade crossings in areas of the U.S. that frequently experience dense fog have been called for by the National Transportation Safety Board.  It was the result of an investigation into a collision between a tractor semitrailer truck and an Amtrak train at a protected, dense fog-shrouded crossing near Stockton, California.  The Board adopted a series of recommendations to correct problems discovered during its investigation.]]></description>
      <pubDate>Sun, 31 Mar 1991 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/352749</guid>
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      <title>ENGINEERING EVALUATION OF CROSSINGS PROMOTES SAFETY</title>
      <link>https://trid.trb.org/View/348858</link>
      <description><![CDATA[Conlan Engineering Company, Incorporated of Tyler, Texas has developed a mobile laboratory which uses on-site computer animation to enact real-life situations.  The system is cost-efficient and evaluates highway grade crossings and crossing accidents which can provide valuable information in litigation or negotiating settlements and can possibly be used to reduce future accidents.  The four major points used in the system are sign visibility, warning devices, speed comparisons and witness visibility.]]></description>
      <pubDate>Mon, 31 Dec 1990 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/348858</guid>
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      <title>DESIGN OF TRAFFIC INTERFACE ON THE BANFIELD LIGHT RAIL PROJECT</title>
      <link>https://trid.trb.org/View/271683</link>
      <description><![CDATA[The methods developed to handle the traffic interface are the key to effective low-cost LRT.  LRT designers are often faced, in varying degrees, with the traditional opposition of traffic engineers to transit priority, with the massive bias against railroad crossings arising from many generations of railroad grade-crossing elimination programs, and with the residual memories of the shortcomings of the old-fashioned streetcars.  However, reviewing the LRT designs during the last decade, steady progress in low-cost design and traffic control techniques can be detected as successive projects have come into service.  Tri-Met confidently expects that its Banfield line will be one further step in this process of evolution.  (Author)]]></description>
      <pubDate>Thu, 31 Jul 1986 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/271683</guid>
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      <title>INTEGRATING LRT INTO FLEXIBLE TRAFFIC CONTROL SYSTEMS</title>
      <link>https://trid.trb.org/View/271684</link>
      <description><![CDATA[The microprocessor traffic signal controller provides the opportunity to implement a flexible and relatively low-cost system of controlling light rail vehicles at signalized intersections.  The signal controller can accommodate special LRT phases that are timed independently of concurrent automobile phases.  Each direction of LRV travel can have its own phase, and these can be called and terminated by ordinary inductance loop detectors.  Different levels of LRV priority, combined with different controller timings and parameter settings at different times of the day, can provide the flexibility needed to accommodate a wide variety of operating conditions and philosophies.  The traffic signal systems proposed for the Woodward Corridor LRT line in Detroit and the Guadalupe Corridor line in Santa Clara County demonstrate how this approach is intended to be used in quite different operational settings.  In Detroit, all the traffic signals will have only two phases, and many will be controlling U-turn slots in a wide median.  The signals will be coordinated at all times.  Partial priority for LRVs will allow selective widening of the LRV green windows where two-way progression for LRVs cannot be provided.  The Guadalupe Corridor system will involve multi-phase vehicle-actuated traffic signals.  These signals will be coordinated at some times of the day and will run free, or uncoordinated, at other times.  Partial priority for LRVs will allow window stretching during coordinated operation, and during free operation full priority will allow an LRV phase to be inserted at any point in the variable length signal cycle.  The proposed signal systems involve the total integration of LRV control into the traffic signal controller logic.   This permits the signal controller to serve LRVs without any priority treatment when appropriate, and also allows variable degrees of LRV priority to be implemented selectively when needed.  In this way it is hoped the disruption and capacity reduction often associated with in-the-median LRT of service for LRT is provided.  It will also permit operational strategies to be fine tuned in the field and altered over time as conditions or priorities change.  (Author)]]></description>
      <pubDate>Thu, 31 Jul 1986 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/271684</guid>
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