This report contains the results of a study to evaluate the feasibility of manufacturing precast, prestressed marine pile from polymer concrete, polymer impregnated concrete, internally sealed concrete and latex modified concrete. Included in the report are (1) a description of the laboratory work that preceded the preparation of the specifications
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1982-11-01
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Nationwide Personal Transportation Survey (NPTS)
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This report is part of a series that presents data relating to the 1977Nationwide Personal Transportation Study.(NPTS).This report presents in tabular form, estimates of variability referred to as standard errors based on information obtained from a probability sample of households interviewed for NPTS. The tables contain standard errors for estima
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The effects of sign luminance on detection and recognition of traffic control devices is mediated through contrast with the immediate surround. Additionally, complex visual scenes are known to degrade visual performance with targets well above visual threshold. A laboratory study was conducted to determine ways of measuring visual complexity and to
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Highway Advisory Radio (HAR) provides traffic operating agencies with the capability to communicate traffic and travel related information to motorists using the vehicle's AM radio receiver. This report presents recommended HAR message development principles. Included are a set of programming principles for constructing messages and examples of mes
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The objective of this study was to generate data on rock properties both in situ and in the laboratory, and of the interaction between the in situ rock and the support-lining-system during the construction of a vehicular tunnel. These data could then be utilized by others to assist in determining if an appropriate tunneling method or a magnitude of
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The Federal Highway Administration sponsored an evaluation of in-situ site investigation techniques in the Forest Glen (Maryland) Field Research Experiment. Fourteen different organizations participated in the experiment using three general approaches (1) Acoustic and seismic techniques, (2) electromagnetic survey techniques, and (3) mechanical tec
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The objective of this study was to evaluate available snowplowable markers under similar traffic and snowplowing operations. There were five different markers tested which included the following: 1) Stimsonite 96, 2) Dura-Brite, 3) recessed, 4) Kingray, and 5) Prismo Roadstud. The Stimsonite 96, Dura-Brite, and recessed markers were found to be acc
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"Abstract A visual inspection was made of the structural condition of 148 highway bridges supported by spread footings on compacted fill throughout the State of Washington. The approach pavements and other bridge appurtenances were also inspected for damage or distress that could be attributed to the use of spread footings on compacted fill. This r
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The purpose of this research study was to examine the specific characteristics of urban arterial traffic accidents, and to identify general causal elements and related countermeasures that can be used to reduce the rate and severity of these accidents. Accident, geometric, traffic control, and volume data were collected and analyzed for 8,678 one-t
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The purpose of this research study was to examine the specific characteristics of urban arterial traffic accidents, and to identify general causal elements and related countermeasures that can be used to reduce the rate and severity of these accidents. Accident, geometric, traffic control, and volume data were collected and analyzed for 8,678 one-t
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The purpose of this research study was to examine the specific characteristics of urban arterial traffic accidents, and to identify general causal elements and related countermeasures that can be used to reduce the rate and severity of these accidents. Accident, geometric, traffic control, and volume data were collected and analyzed for 8,678 one-t
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The purpose of this research study was to examine the specific characteristics of urban arterial traffic accidents, and to identify general causal elements and related countermeasures that can be used to reduce the rate and severity of these accidents. Accident, geometric, traffic control, and volume data were collected and analyzed for 8,678 one-t
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The objectives of the study were: (a) to determine what information drivers need to travel through work zones safely and efficiently; (b) to determine how this information can best be conveyed to the drivers; and (c) to determine where improvements to the present system of work zone traffic control are needed. The study began with an analysis of dr
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This study discusses the methods used by Nicholson Construction Company in the design of permanent ground anchors specifically as related to retaining walls. Basic soil parameters, design concepts, drilling and grouting methods for ground anchors are discussed. Particular emphasis is placed on anchors founded in soil rather than rock formations. Al
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This document summarizes the main design methods used by the principal investigators in the design of permanent ground anchors, including basic concepts, design criteria, and analytical techniques. The application of these design methods are illustrated in the step-by-step design of a permanent ground anchor system for an example problem. Companion
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Reorganization of the Federal Highway Administration’s Offices of Research and Development; A Review of Accident Research Involving Truck Size and Weight; Aggregate Gradation Control: Part II—A Model Aggregate Gradation Control Program; The MAXBAND Program for Arterial Signal Timing Plans; Progress Report on the CMD: A Device for Continuous Monitor
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