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    <title>Transport Research International Documentation (TRID)</title>
    <link>https://trid.trb.org/</link>
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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>A COMPARISON OF TWO METHODOLOGIES FOR SELECTING TRANSIT PERFORMANCE INDICATORS</title>
      <link>https://trid.trb.org/View/277132</link>
      <description><![CDATA[Two contrasting methodologies have appeared in the literature for selecting indicators to evaluate the performance of public transit firms.  One methodology specifies the criteria that the selected performance indicators must satisfy.  The other methodology requires the specification of operating objectives by the transit form for the purpose of then selecting performance indicators. This paper compares the two methodologies and discusses the attributes of one methodology versus those of the other methodology.  Also, a major difference in the premises of the two methodologies is demonstrated.]]></description>
      <pubDate>Sat, 28 Aug 2004 04:47:01 GMT</pubDate>
      <guid>https://trid.trb.org/View/277132</guid>
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    <item>
      <title>TRANSPORTATION ACCESS AND THE LOCATION OF ADVANCED TECHNOLOGY FIRMS IN PENNSYLVANIA. FINAL REPORT. VOLUME II: TECHNICAL APPENDIX</title>
      <link>https://trid.trb.org/View/273461</link>
      <description><![CDATA[This two volume report contains findings from surveys of Advanced Technology (AT) firms and comparable non-AT firms in five Pennsylvania corridors in which AT firms are concentrated.  The key conclusion from these findings is that AT firms warrant the special attention of multi-modal transportation planning, programming and operations since these firms use a more diverse variety of transportation modes in the five corridors in which they are concentrated. This conclusion suggests a statewide and corridor approach to transportation systems concerns.  These findings also suggest that transportation is viewed as a necessary but not sufficient condition for locating and conducting successful business operations at a particular site in a corridor. Accordingly, economic development programs and transportation planning and programming activities warrant coordination.  An annotated bibliography, copies of survey instruments, and responses to open-ended questions are contained in Volume II.]]></description>
      <pubDate>Sat, 28 Aug 2004 04:06:50 GMT</pubDate>
      <guid>https://trid.trb.org/View/273461</guid>
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    <item>
      <title>TRANSPORTATION ACCESS AND THE LOCATION OF ADVANCED TECHNOLOGY FIRMS IN PENNSYLVANIA. FINAL REPORT. VOLUME I: RESEARCH FINDINGS AND RECOMMENDATIONS</title>
      <link>https://trid.trb.org/View/273460</link>
      <description><![CDATA[This two volume report contains findings from surveys of Advanced Technology (AT) firms and comparable non-AT firms in five Pennsylvania corridors in which AT firms are concentrated.  The key conclusion from these findings is that AT firms warrant the special attention of multi-modal transportation planning, programming and operations since these firms use a more diverse variety of transportation modes in the five corridors in which they are concentrated. This conclusion suggests a statewide and corridor approach to transportation systems concerns.  These findings also suggest that transportation is viewed as a necessary but not sufficient condition for locating and conducting successful business operations at a particular site in a corridor. Accordingly, economic development programs and transportation planning and programming activities warrant coordination.  A review of the pertinent literature, description of the research methods, and an analysis of current statewide and corridor transportation planning, programming, and operations are contained in Volume I.]]></description>
      <pubDate>Sat, 28 Aug 2004 04:06:49 GMT</pubDate>
      <guid>https://trid.trb.org/View/273460</guid>
    </item>
    <item>
      <title>EVALUATING SOFTWARE</title>
      <link>https://trid.trb.org/View/271092</link>
      <description><![CDATA[This article provides guidelines for evaluating software suppliers and the software itself.  Suppliers can best be evaluated by looking at sales, support and service.  Are the supplier's sales people helpful and  knowledgeable?  Do they understand a customer's needs, or do they just want to sell you something?  Software support should include: training manuals, and classes, telephone hot-lines to qualified people at convenient hours, demonstration systems available for use before purchase, practice systems available for use after purchase and before installation, and a regular newsletter on how to use the software.  Software service should include: fixing software problems quickly and accurately, upgrading software to keep up with advances in computer technology; notification of problems and upgrades through letters or newsletters; and clearly describing how to easily intergrate fixes and news releases into the existing software.  The software itself should be evaluated by input requirements (should be well defined and easily understood), computation methods (should be standard for one's discipline and complete), user procedures (should be complete and easy to follow), outputs (should be easily understood, list input dates and show intermediate calculations), and price (should reflect the complexity and quality of the programs, manuals, support reliability and marketing and should be less than the cost of fully developing the software oneself.]]></description>
      <pubDate>Fri, 27 Aug 2004 22:00:25 GMT</pubDate>
      <guid>https://trid.trb.org/View/271092</guid>
    </item>
    <item>
      <title>MEDICAL SELECTION AMONG PUPILS ENROLLING IN SCHOOL FOR PROFESSIONAL DRIVERS OR SIMILAR VOCATION</title>
      <link>https://trid.trb.org/View/269942</link>
      <description><![CDATA[The author claims that pupils preparing to become professional drivers or to work as planners of operation scheduling in a transportation firm should be medically examined before enrolling in such a school. The examination should be carried out according to the principles and medical standards applied in examinations for professional drivers on entry to the profession. It is recommended that doctors of school medicine should consult institutions where there are experts who regularly perform examinations for drivers (centres for traffic medicine and psychology). Otherwise, it might happen that a pupil, having finished his education and training for professional driver is found to be unfit to drive when he takes his medical examinations on entry to the profession, due to some health disorder or disease.  (TRRL)]]></description>
      <pubDate>Fri, 27 Aug 2004 21:57:15 GMT</pubDate>
      <guid>https://trid.trb.org/View/269942</guid>
    </item>
    <item>
      <title>CHEMICAL GROUTING - 2</title>
      <link>https://trid.trb.org/View/269820</link>
      <description><![CDATA[This paper, part 2 of a 3 part series, describes grout systems.  Grout selection is discussed and common grout compositions which are currently in use are listed.  A set of criteria was provided to help the engineer to judge how best to meet a performance specification.  These include optimum injection method, availability of grout materials, stability of grout in situ.  Viscosity of various grouts is considered by reference to a graph showing the growth of viscosity in period before gelation. Other aspects discussed are setting time, stability, strength of grouted formation, creep of grouted formation, and resistance of grout to extrusion.  Tables of information are presented showing grouts used in alluvial grouting, grouting limits of common mixes and relative material costs of grout formulations. Other topics described are the permeability of grouted formations, permanence and health and safety aspects.]]></description>
      <pubDate>Fri, 27 Aug 2004 21:56:56 GMT</pubDate>
      <guid>https://trid.trb.org/View/269820</guid>
    </item>
    <item>
      <title>DEVELOPMENT OF COST-EFFECTIVE BRIDGE SYSTEMS, PHASE II. FINAL REPORT</title>
      <link>https://trid.trb.org/View/268675</link>
      <description><![CDATA[The goals of this study were, first, to provide the bridge designer with the concept of a systematic procedure that would enable him to select the most cost-effective short-span bridge superstructure for a prospective site, and second, to develop an optimization method that would provide him with the minimum-cost configuration of either a composite or a noncomposite bridge that is composed of a cast-in-place concrete deck on steel beams.  To meet the first goal, a list was compiled of the bridge systems that have proven to be economical for span lengths of up to 100 ft.  Decision logic tables were devised to help the designer select, from this list, a few of the more suitable bridge systems for a given site.  An assessment procedure was established to rank the systems that survived the first level of screening.  The bridge system with the highest ranking would be selected for the given site.  An interactive computer program has been written for an IBM PC for implementation of the method.  In order to reach the second goal, the elements involved in the design of the two selected bridge systems and their relevant design constraints were identified.  Constraints were handled directly and the univariate search method of optimization was used.  An interactive computer program was written in FORTRAN V that runs on the Conversational Monitor System of IBM.  It provides the user with the necessary data for the minimum-cost configuration of either of the two bridge types.]]></description>
      <pubDate>Fri, 27 Aug 2004 21:44:01 GMT</pubDate>
      <guid>https://trid.trb.org/View/268675</guid>
    </item>
    <item>
      <title>TRANSIT: MODEL FOR PROVIDING GENERIC TRANSPORTATION INPUT FOR PRELIMINARY SITING ANALYSIS</title>
      <link>https://trid.trb.org/View/268455</link>
      <description><![CDATA[To assist the US Department of Energy's efforts in potential facility site screening in the nuclear waste management program, a computerized model, TRANSIT, is being developed. Utilizing existing data on the location and inventory characteristics of spent nuclear fuel at reactor sites, TRANSIT derives isopleths of transportation mileage, costs, risks and fleet requirements for shipments to storage sites and/or repository sites.  This technique provides a graphic, first-order method for use by the Department in future site screening efforts.]]></description>
      <pubDate>Fri, 27 Aug 2004 21:39:50 GMT</pubDate>
      <guid>https://trid.trb.org/View/268455</guid>
    </item>
    <item>
      <title>LIFE-CYCLE ANALYSIS FOR PAVEMENT MANAGEMENT DECISION MAKING-METHODOLOGY DEVELOPMENT</title>
      <link>https://trid.trb.org/View/266909</link>
      <description><![CDATA[This report summarizes the results of methodology development for life-cycle analysis of pavements.  The life-cycle cost methodology is primarily concerned with a comprehensive economic evaluation of competing design alternatives.  The design alternatives will be user inputs. The cost models include initial construction costs, maintenance and rehabilitation costs, usser costs due to traffic delays, user operating costs related to pavement performance, peripheral costs and salvage values.  The LCC methodology will consider several different economic scenarios by providing options for varying analysis periods, ingnoring inflation, using different interest rates, considering annual equivalent annuity and ignoring user costs.  A microcomputer program (LCC1) for life-cycle cost analysis of Pennsylvania pavements is being developed using the LCC methodology and specifications described in this report.  (Author)]]></description>
      <pubDate>Fri, 27 Aug 2004 21:14:04 GMT</pubDate>
      <guid>https://trid.trb.org/View/266909</guid>
    </item>
    <item>
      <title>DEVELOPMENT OF A VALUE CRITERIA METHODOLOGY FOR ASSESSING HIGHWAY SYSTEMS COST-EFFECTIVENESS</title>
      <link>https://trid.trb.org/View/214878</link>
      <description><![CDATA[A resource allocation procedure was needed for selecting the most cost-effective set of countermeasures to address any given highway safety problem.  The procedure developed in response to this need is divided into three phases.  In Phase 1, (1) the possible countermeasures are identified; (2) their cost and potential impact on accidents are estimated; (3) the effectiveness estimates are adjusted to reflect the loss in impact that is likely to result from a failure to properly install, use, and maintain each countermeasure; (4) other nonsafety impacts of each countermeasure are identified; and (5) the timing, cost, and probability offgaining approval for each countermeasure are estimated.  In Phase 2, the present value of the benefits and costs for each countermeasure is determined; values are placed on the nonmonetary benefits; a benefit-cost or cost-effectiveness measure is computed for each countermeasure are identified.  Phase 3 includes application of a methodology for selecting the most cost-effective set of countermeasures to implement and an analysis of how sensitive the set selected is to variation in parameters like discount rates and accident costs that were used in the valuation procedure.  The methodology was applied to two highway safety problems that demonstrate its use.  The best solution to the stopping-sight-distance problem combined installation of flashing beacon signs on hazardous horizontal curves;   required inclusion of high-mounted, center rear brake lights on new cars; and training for new drivers on how to recognize and respond to hazardous sight-distance situations.  The best solution to the drunk-driving problem combined 10 countermeasures, including highway, driver, and vehicle countermeasures.  (Author) vehicle countermeasures.  (Author)]]></description>
      <pubDate>Wed, 25 Aug 2004 01:43:36 GMT</pubDate>
      <guid>https://trid.trb.org/View/214878</guid>
    </item>
    <item>
      <title>POWERED WHEELCHAIRS. A GUIDE TO HELP YOU CHOOSE</title>
      <link>https://trid.trb.org/View/214820</link>
      <description><![CDATA[This report explains what to look for in a powered wheelchair, where to go for advice and gives basic details of the powered wheelchairs on the market for indoor and outdoor use.  Guidelines on maintenance are included together with data on powered wheelchairs for children. Fact sheets giving details of all wheelchairs on the market (summer 1984) are appended.  (TRRL)]]></description>
      <pubDate>Wed, 25 Aug 2004 01:42:06 GMT</pubDate>
      <guid>https://trid.trb.org/View/214820</guid>
    </item>
    <item>
      <title>WEAR-RESISTANT AND SKID-RESISTANT HIGHWAY PAVEMENT SURFACES</title>
      <link>https://trid.trb.org/View/140844</link>
      <description><![CDATA[Procedures for improving the resistance to wear and polishing of new pavements, and for correcting worn or needs and the associated problems, and how to implement literature was extensively reviewed and method is described for classifying pavement systems with regard to wear and skid resistance, tentative performance criteria. Recommendations are made for use of the systems judged to be most suitable for practical application.  An annotated bibliography of more that 500 items on the subject is presented and recommendations are made for more innovative pavement systems.  The findings of the investigation are outlined and a brief description is given of ten systems selected as suitable for immediate practical application. Aggregates (selection of which is of prime importance in the design of a wear-and-skid-resistance surface) are divided process, with the assumption that the proposed limits are classification may be employed as a guideline for the selection of fine aggregate to produce polish-resistant Portland cement concrete where the surface mortar is a more entitled "a motorist radio service" is supported by the resistance than is coarse aggregate.  For asphaltic concrete, asphalt surface treatments, and similar systems, it is the coarse aggregate that is more important.  The selection of an optimum system for a specific location is discussed.]]></description>
      <pubDate>Mon, 16 Aug 2004 20:49:03 GMT</pubDate>
      <guid>https://trid.trb.org/View/140844</guid>
    </item>
    <item>
      <title>TIPS ON CHOOSING LIME FOR ROAD STABILIZATION</title>
      <link>https://trid.trb.org/View/121754</link>
      <description><![CDATA[FUNDAMENTALS OF CLAY STABILIZATION BY LIME AND THE IMPORTANCE OF THE CALCIUM HYDROXIDE CONTENT OF LIME ARE OUTLINED. IMPORTANT QUALITIES TO LOOK FOR WHEN OBTAINING LIME FROM A MANUFACTURER ARE NOTED, AND THE DUSTING PROBLEM IS CONSIDERED.]]></description>
      <pubDate>Sun, 15 Aug 2004 02:40:40 GMT</pubDate>
      <guid>https://trid.trb.org/View/121754</guid>
    </item>
    <item>
      <title>TRUCK AND TAXI SAMPLE SELECTION</title>
      <link>https://trid.trb.org/View/118751</link>
      <description><![CDATA[THE TRUCK AND TAXI SURVEY WAS ONE OF THE SEVERAL ORIGIN AND DESTINATION SURVEYS CONDUCTED BY THE TRANSPORTATION STUDY STAFF OF THE SWRPC AS A PART OF THE REGIONAL LAND-USE TRANSPORTATION STUDY. THE PROCEDURES FOLLOWED IN SELECTING SAMPLE TRUCKS AND TAXIS FOR THE PERSONAL INTERVIEW SURVEY ARE EXPLAINED. SINCE THE METHOD USED FOR SELECTING THE SAMPLE TRUCKS DIFFERED FROM THAT USED FOR TAXIS, THE DISCUSSION OF DRAWING EACH SAMPLE IS HANDLED SEPARATELY. ALL OTHER TRUCK AND TAXI OWNERS IN THE REGION WERE CONTACTED BY MEANS OF POSTAL QUESTIONNAIRES. THE SAMPLE SIZE DETERMI- NATION, PROCEDURES FOLLOWED TO ASSEMBLE THE UNIVERSE AND THE METHODS USED TO DRAW THE SAMPLE ARE DESCRIBED. REFERENCES' MOTOR VEHICLE REGISTRATIONS FOR PERIOD JULY 1, 1961 THROUGH JUNE 30, 1962, STATE OF WISCONSIN MOTOR VEHICLE DEPARTMENT.]]></description>
      <pubDate>Sun, 15 Aug 2004 02:03:22 GMT</pubDate>
      <guid>https://trid.trb.org/View/118751</guid>
    </item>
    <item>
      <title>USE OF TRACER TECHNIQUE IN SOIL EROSION RESEARCH</title>
      <link>https://trid.trb.org/View/118251</link>
      <description><![CDATA[TECHNIQUES USED TO STUDY EROSION BY TAGGING SOIL WITH RADIOACTIVE TRACERS ARE REVIEWED. GUIDELINES TO BE FOLLOWED IN THE SELECTION OF A TRACER ARE DISCUSSED, AND METHODS OF INCORPORATING THE ISOTOPE ON THE MATERIAL TO BE TRACED ARE DESCRIBED. STUDIES ARE DISCUSSED IN WHICH BOTH THE MOVEMENT OF SINGLE GRAINS OF SAND AND THE BULK MOVEMENT OF THE SOIL ARE FOLLOWED. THE METHODS USED FOR STUDYING SOIL EROSION WITH TRACERS ARE ANALYZED AND EVALUATED. /AUTHOR/]]></description>
      <pubDate>Sun, 15 Aug 2004 01:50:50 GMT</pubDate>
      <guid>https://trid.trb.org/View/118251</guid>
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