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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>Impact of Revision of Traffic Projects on Traffic Safety</title>
      <link>https://trid.trb.org/View/1512360</link>
      <description><![CDATA[Road safety is a challenge to the entire community, and especially the engineers and experts who deal with traffic. The challenge of traffic safety should be expressed in audit projects of road infrastructure, as a preventive measure in order to increase traffic safety. Road safety audit is an independent, thorough, systematic, technical analysis of security relating to the design characteristics of the project of road infrastructure, and covering all stages from planning to initial road management. Increasing road safety can be greatly improved by implementing preventive methods to prevent traffic accidents, including its audit and inspection of road safety. By their nature these two methods are classified into preventive methods to improve safety, because they try to detect and eliminate potential causes of accidents before accidents occur. The importance of these methods in improving road safety is reflected in the fact that these two methods were covered by the Directive 2008/96 / EC of the European Parliament and of the Council on road safety. Road safety revision is a formal review of the safety performance of existing or future roads by a multidisciplinary team of experts. The revision of road safety qualitatively assesses and reports on the security problems, and points to the problems of safety and the possibility of improving traffic safety. This paper will present the current state regarding revision of traffic projects, and provide conclusions and measures to improve it in the future.]]></description>
      <pubDate>Thu, 17 May 2018 14:46:07 GMT</pubDate>
      <guid>https://trid.trb.org/View/1512360</guid>
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      <title>Revision of a Flawed Acceptance Standard</title>
      <link>https://trid.trb.org/View/1493455</link>
      <description><![CDATA[A major revision of American Association of State Highway and Transportation Officials (AASHTO) Standard R9-84, Acceptance Sampling Plans for Highway Construction, has just been completed. The primary goals were to correct a major conceptual error and to reduce the level of complexity. This report discusses the flaws in the original version, describes the basic changes that were made, and presents a significant addition to the new standard in the form of operating characteristic tables that enable the user to quickly and easily select acceptance plans that will provide the desired degree of quality assurance. Computer simulation is used to demonstrate that single-limit variables operating characteristic curves are sufficiently accurate for most double-limit applications. Two examples are included to illustrate the use of the revised standard.]]></description>
      <pubDate>Mon, 08 Jan 2018 17:22:32 GMT</pubDate>
      <guid>https://trid.trb.org/View/1493455</guid>
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      <title>Acquisition: Acquiring Real Property for Federal and Federal-Aid Programs and Projects</title>
      <link>https://trid.trb.org/View/1440553</link>
      <description><![CDATA[Government programs designed to benefit the public as a whole often result in acquisition of private property and, sometimes, in the displacement of people from their residences, businesses or farms. Acquisition of this kind has long been recognized as a right of government and is known as the power of eminent domain. The Fifth Amendment of the Constitution states that private property shall not be taken for public use without just compensation. To provide uniform and equitable treatment for persons whose property is acquired for public use, Congress passed the Uniform Relocation Assistance and Real Property Acquisition Policies Act of 1970, and amended it in 1987. This law, called the Uniform Act, is the foundation for the information discussed in this brochure. Revised rules for the Uniform Act were published in the Federal Register on January 4, 2005. The rules are reprinted each year in the Code of Federal Regulations (CFR), Title 49, Part 24. All Federal, State and local government agencies, as well as others receiving Federal financial assistance for public programs and projects, that require the acquisition of real property, must comply with the policies and provisions set forth in the Uniform Act and the regulation. The acquisition itself does not need to be federally-funded for the rules to apply. If Federal funds are used in any phase of the program or project, the rules of the Uniform Act apply. The rules encourage acquiring agencies to negotiate with property owners in a prompt and amicable manner so that litigation can be avoided. This brochure explains your rights as an owner of real property to be acquired for a federally-funded program or project.]]></description>
      <pubDate>Thu, 29 Dec 2016 17:03:54 GMT</pubDate>
      <guid>https://trid.trb.org/View/1440553</guid>
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      <title>Revision to the SUDAS Traffic Signal Design Guide</title>
      <link>https://trid.trb.org/View/1395351</link>
      <description><![CDATA[Changes in technology have an impact on standard practice, materials, and equipment. The traffic signal industry is constantly producing more energy-efficient and durable equipment, better communications, and more sophisticated detection and monitoring capabilities. Accordingly, this project provides an update to the traffic signal content within the Statewide Urban Design and Specifications (SUDAS) Design Manual and Standard Specifications. This work was completed through a technical advisory committee with a variety of participants representing contractors, the Iowa Department of Transportation, cities, consultants, vendors, and university research and support staff.]]></description>
      <pubDate>Sat, 16 Jan 2016 12:41:33 GMT</pubDate>
      <guid>https://trid.trb.org/View/1395351</guid>
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      <title>Update the Center for Roundabout Research and Training Website</title>
      <link>https://trid.trb.org/View/1229778</link>
      <description><![CDATA[The goal of this project is to review, edit and update the Center for Roundabout Research and Training Website [http://transport.ksu.edu/roundabouts/] to delete old information and incorporate current material. College of Engineering Computer Services Staff and the CE department webmaster will perform the initial revisions to the website to make it compatible with current Kansas State University (KSU) web design format.]]></description>
      <pubDate>Thu, 03 Jan 2013 13:48:28 GMT</pubDate>
      <guid>https://trid.trb.org/View/1229778</guid>
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    <item>
      <title>The "Highway Safety Manual": Improving Methods and Results</title>
      <link>https://trid.trb.org/View/1223554</link>
      <description><![CDATA[The "Highway Safety Manual," created to reduce fatal and serious crashes on the nation’s highways, represents a dedicated effort to drive the science of safety into practical use and to integrate safety into every highway project, program, and activity. The author reviews the basic concepts, software tools, supporting documents, ongoing research, training, implementation, and upcoming revisions.]]></description>
      <pubDate>Wed, 28 Nov 2012 15:06:33 GMT</pubDate>
      <guid>https://trid.trb.org/View/1223554</guid>
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      <title>Revision to the SUDAS Traffic Signal Standards – Phase 2</title>
      <link>https://trid.trb.org/View/1147461</link>
      <description><![CDATA[This report provides a summary of the updates to the traffic signal content within the Iowa Statewide Urban Design and Specifications (SUDAS) Design Manual Chapter 13 and Standard Specifications Division 8. Major focal points included pole footing design, cabinets and controllers, monitoring systems, communications systems, and figure updates. This work was completed through a project task force with a variety of participants (contractors, Iowa Department of Transportation, city traffic engineers, consultant, vendors, and University research and support staff).]]></description>
      <pubDate>Thu, 02 Aug 2012 16:16:17 GMT</pubDate>
      <guid>https://trid.trb.org/View/1147461</guid>
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      <title>Fatigue Evaluation of Steel Bridges</title>
      <link>https://trid.trb.org/View/1144251</link>
      <description><![CDATA[This report provides proposed revisions to Section 7—Fatigue Evaluation of Steel Bridges of the "AASHTO Manual for Bridge Evaluation" with detailed examples of the application of the proposed revisions.  The proposed revisions and examples were developed based on analytical and experimental research conducted to improve existing methods to evaluate and assess the serviceability of bridge structures for the fatigue limit state.  The material in this report will be of immediate interest to highway design engineers.]]></description>
      <pubDate>Thu, 26 Jul 2012 16:08:04 GMT</pubDate>
      <guid>https://trid.trb.org/View/1144251</guid>
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    <item>
      <title>Revision of "Highway Snowstorm Countermeasure Manual": Focus on Snowbreak Woods</title>
      <link>https://trid.trb.org/View/1138918</link>
      <description><![CDATA[Hokkaido is a cold, snowy region located in the northernmost part of Japan and depends heavily on automobiles for transportation in daily life and socioeconomic activity. Forty percent of recent road closures on national highways in Hokkaido have been caused by snowstorms, including large-scale phenomena in which significant numbers of vehicles were stranded for extended periods. Such incidents adversely affect socioeconomic activity in the region. The Hokkaido Regional Development Bureau, which manages national highways in Hokkaido, published the first edition of the "Highway Snowstorm Countermeasure Manual" in 1990 as a collection of technical criteria for facilities to control blowing snow. The publication was revised in 2003. However, over seven years have passed since the last revision, and user demand has grown for the manual to reflect new findings and blowing-snow control technologies. Against this backdrop, the Civil Engineering Research Institute for Cold Region (CERI) spent 3 years revising the publication from 2008 onward. This document provides an overview of the revised "Highway Snowstorm Countermeasure Manual," with particular emphasis on snowbreak woods.]]></description>
      <pubDate>Fri, 25 May 2012 10:32:59 GMT</pubDate>
      <guid>https://trid.trb.org/View/1138918</guid>
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      <title>Recommendations on Harmonized Europe-wide Technical Requirements for Inland Navigation Vessels</title>
      <link>https://trid.trb.org/View/1132950</link>
      <description><![CDATA[The Pan-European requirements for the construction of inland navigation vessels were first harmonized in 1975 with the adoption by the United Nations Economic Commission for Europe (UNECE) of the Recommendations on Technical Requirements for Inland Navigation Vessels (Resolution No. 17). The UNECE Working Party on Inland Water Transport undertook a fundamental revision of its 1975 Recommendations and, at its special session in March 2006, adopted the Recommendations on Harmonized Europe-Wide Technical Requirements for Inland Navigation Vessels (annex to Resolution No. 61). These Recommendations establish a Pan- European regime of technical requirements for inland navigation vessels that transport goods and passengers internationally. They are the result of Government efforts to unify the divergent regulations in force in different intergovernmental organizations and UNECE member countries. The requirements are in line with European Union legislation. They are intended to facilitate the recognition of ship's certificates, thus eliminating the need for more than one inspection of vessels engaged in international transport by inland waterways. The Recommendations also contain strict regulations on limitation of air and water pollution and on the abatement of noise. They also include the internationally agreed standards for minimum manning requirements and the working and rest hours of crews. This publication is the first revision of Resolution No. 61, as amended by Resolutions Nos. 64, 65 and 68 of the Working Party on Inland Water Transport (ECE/TRANS/SC.3/172/Amends.1–3). The main purpose of the current revision is to keep the Recommendations up to date, especially in the light of relevant developments in the EU and the legislation of the river commissions.]]></description>
      <pubDate>Wed, 29 Feb 2012 15:39:36 GMT</pubDate>
      <guid>https://trid.trb.org/View/1132950</guid>
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    <item>
      <title>Scientific Analysis of the ASPPR Hybrid System for Type B Vessels</title>
      <link>https://trid.trb.org/View/1122150</link>
      <description><![CDATA[Significant research has shown that Transport Canada’s Arctic Shipping Pollution Prevention Regulations (ASPPR) need to be modified and updated. The Canadian Hydraulics Centre of the National Research Council of Canada has been conducting research on methods to improve and update the system. This report provides information on a proposed revised approach (Hybrid System) for dealing with Type B vessels in Canada’s Arctic waters. The proposed Hybrid System would redefine some of the existing Zone boundaries and allow mostly expanded windows for shipping using a combination of Ice Regime System Mandatory dates and Open Zone dates. The report is intended as a starting point for discussion with key Stakeholders of the ASPPR.]]></description>
      <pubDate>Thu, 03 Nov 2011 17:00:03 GMT</pubDate>
      <guid>https://trid.trb.org/View/1122150</guid>
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      <title>Transportation Improvement Program Revision Process</title>
      <link>https://trid.trb.org/View/1105783</link>
      <description><![CDATA[Federal legislation requires metropolitan planning organizations (MPOs) to adopt and regularly update a Transportation Improvement Program (TIP) identifying a prioritized list of projects covering a four-year period.  This synthesis compiles and documents the different ways that MPOs approach revising the TIP onces it has been adopted.  Information used in this study was acquired through a review of the literature and a survey of 45 MPOs across the country.  Follow-up interviews with the MPOs were conducted as case examples.]]></description>
      <pubDate>Tue, 12 Jul 2011 07:49:42 GMT</pubDate>
      <guid>https://trid.trb.org/View/1105783</guid>
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      <title>Supporting 4D Trajectory Revisions on the Flight Deck: Design of a Human–Machine Interface</title>
      <link>https://trid.trb.org/View/1089487</link>
      <description><![CDATA[To accomplish air traffic growth in a safe and efficient way, future air traffic management concepts require aircraft to accurately execute 4-dimensional (4D) trajectories. A trajectory planned prior to takeoff, might, however, require in-flight revision. To support the flight crew in their task of accurately replanning a flight plan up to a metering fix, in 4 dimensions, a dedicated planning interface has been designed, adopting a cognitive systems engineering approach. The interface allows direct manipulation of the ground track and the descent profile. Constraints on trajectory planning are mapped onto alternative waypoint locations, highlighting the possibilities for acceptable ground track geometry in the horizontal situation display. In the vertical situation display, these constraints are mapped onto candidate top- and bottom-of-descent locations. It is hypothesized that the designed interface enables pilots to efficiently plan suitable 4D trajectories, while allowing for adaptive behavior and supporting situation awareness, even under high workload conditions.]]></description>
      <pubDate>Mon, 31 Jan 2011 07:47:08 GMT</pubDate>
      <guid>https://trid.trb.org/View/1089487</guid>
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      <title>Field Test Results of the Multimodal Level of Service Analysis for Urban Streets</title>
      <link>https://trid.trb.org/View/923804</link>
      <description><![CDATA[The objective of the first two phases of NCHRP Project 3-70 was to develop and test a framework and enhanced methods for determining levels of service for automobile, transit, bicycle, and pedestrian modes on urban streets, in particular with respect to the interaction among the modes. Phase 2 resulted in the multimodal level of service method (MMLOS) described in NCHRP Report 616, "Multimodal Level of Service for Urban Streets."  The objective of Phase 3 of NCHRP Project 3-70 was to field test the MMLOS method with various public agencies around the United States. This Final Report presents the results of this third phase of the research. During Phase 3 the MMLOS method was field tested in 10 metropolitan areas of the United States. Public agency staffs were trained on the MMLOS method and it’s implementing software. They assisted in data collection and evaluated the suitability of the MMLOS method for use within their agency. Based on the results of these field tests several revisions were made to the spreadsheet software for implementing MMLOS. Additional guidance was provided to deal with conditions encountered in the field that were not anticipated when the original guide, NCHRP Web-Only Document 128, was written. Finally, a few minor modifications to the pedestrian level of service model are recommended to improve its sensitivity to some of the conditions encountered in the field tests.]]></description>
      <pubDate>Wed, 21 Jul 2010 17:05:45 GMT</pubDate>
      <guid>https://trid.trb.org/View/923804</guid>
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    <item>
      <title>Study of Elastomeric Bearings for Superelevated U-Beam Bridges</title>
      <link>https://trid.trb.org/View/919216</link>
      <description><![CDATA[The primary objective of this research was to determine the best way to consider the effects of transverse superelevation on uniform-height steel-reinforced elastomeric bearing pads for U-Beam bridges. Existing Texas Department of Transportation (TxDOT) design provisions did not specifically account for the effects of the transverse superelevation. A nationwide survey of state DOTs revealed that the country was nearly evenly split on whether or not superstructure elements such as U-Beams should be placed on a transverse superelevation. Specific modifications to the AASHTO Method “A” design of elastomeric bearing equations were developed to account for the transverse superelevation. The proposed modifications were evaluated over typical U-Beam span/spacing combinations for both the U-40 and U-54 sections. The ability of the proposed modifications to predict actual behavior was evaluated by inspecting existing bridges and performing full-scale laboratory testing. Both the field inspections and the laboratory testing validated the need for the proposed revisions. These proposed revisions have been submitted as suggested revisions to the TxDOT LRFD Bridge Design Manual. The feasibility of electronic monitoring of in-situ bearings that have experienced significant transverse deflections was investigated. The bulging on the sides of the bearings made monitoring unreliable. Instead, a method to manually record pertinent information during the routine bridge inspection is recommended.]]></description>
      <pubDate>Tue, 08 Jun 2010 15:57:49 GMT</pubDate>
      <guid>https://trid.trb.org/View/919216</guid>
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