The purpose of the study is to identify various problems which are likely to arise during highway metrication and to prepare a detailed plan for research aimed at solving conversion problems. Investigations reveal a need for an early selection of the metric units to be used, the vital importance of early metrication of specifications and standards,
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The purpose of this text is to provide highway personnel with a working knowledge of concrete polymer development and application. Basic information necessary to begin experimental application of these materials is presented. The text presents discussions on the following: (1) a review of concrete-polymer materials development, (2) knowledge of pol
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The study purpose is to identify various problems which are likely to arise during highway metrication and to prepare a detailed plan for research aimed at solving conversion problems. Investigations reveal a need for an early selection of the metric units to be used, the vital importance of early metrication of specifications and standards, and th
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The objective of this research study was to obtain data needed to reach rational decisions regarding currently nonuniform state licensing and permit requirements on commercial interstate truckers as well as taxes and fees associated with those requirements. To obtain these data, over 750 truck drivers were interviewed at 10 locations across the cou
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The design of a system for scanning sequences of aerial photographs with a computer-controlled flying-spot scanner and automatically measuring vehicle locations is described. Hardware and software requirements for an operational system of this type are enumerated. Measurement accuracy is predicted to be comparable to that achieved with manual metho
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Available theories and prediction formulas on scour at bridge waterways are reviewed. Formulas that offer potential for prediction of scour around bridge piers are compared by reducing each formula to a non-dimensional form that includes Froude Number, the ratio of scour depth to pier width, and the ratio of stage to pier width. A field study to ga
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This report presents the results of a laboratory study to evaluate the effectiveness of two proprietary materials, Paczyme and Reynolds Road Packer, for improving the compactability and strength of fine-grained soils. The testing program used to evaluate the materials was developed by FHWA and endorsed by the manufacturers prior to its initiation.
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A study of chemical stabilization of soils began in 1954 with a program enlisting the aid of chemical industry in the search for effective chemicals. Nineteen firms signed a letter of agreement, and others cooperated on an informal basis. Federal participation consisted mainly of consultation, instruction, development of suitable laboratory evaluat
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Urban Traffic Control/Bus Priority System; Nuclear Gage for Measuring the Cement Content of Plastic Concrete; Reducing Uncertainty in Interchange Design Evaluations; Structural Behavior of Typical Highway Inlet Grates; Highway Design for Motor Vehicles—A Historical Review Part 2: The Beginnings of Traffic Research
A comprehensive literature review,multi-state questionnaires, mathematical modeling, computer simulations, field testing and data correlations were used to establish tentative criteria relating to geometric and pavement surface texture and cross slope to minimize highway hydroplaning. More specifically the authors have covered in detail the empiric
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A laboratory evaluation of the feasibility of utilizing sewage sludge in construction of a highway embankment was conducted. Mixtures composed of lime, fly ash, waste calcium sulfate and up to 17 percent sewage sludge were evaluated. The effect of lime type, fly ash source and the relative proportions of lime, fly ash and waste calcium sulfate on c
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