The recent phenomenal growth of bicycling activity has been paralleled by accelerating concerns for increases in bike-involved accidents and demands for good recreational and utility-oriented facilities on which to ride. All jurisdictional levels have responded with enforcement, development of bikeway locational and design criteria, and provision o
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This research study involved the load testing and structural analysis of eight typical State Highway Department inlet grates; six roadway and two median grates. Other grate variables were: steel or cast iron. shape of grate members. and flat or sloped installed grate surface. The objectives of the study were: (1) to determine the structural behavio
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The paper gives an overview of road roughness technology, lists the most prominent equipment used in longitudinal profile evaluations, and discusses uses of the measurements. Several types of roughness measurement equipment are operational for the purpose of measuring riding quality; whereas, development of equipment, reduction procedures, and mean
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This report presents a simplified procedure for computing vehicle offtracking on curves. It was developed during a research effort to determine what the offtracking requirements were if the width of buses for operation on the Interstate Highway System was increased from 96 to 102 inches. The procedure was developed by modifying the existing procedu
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1973-11-01
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Nationwide Personal Transportation Survey (NPTS)
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PDF
The report presents personal characteristics of all individuals 5 years old and over who reported making a one-way trip by a motorized vehicle, including automobile (driver and passenger separately), motorcycle, truck, schoolbus, taxicab, bus, subway, train, and airplane. The percent distributions of these trips by mode are related to age, sex, rac
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The report contains the authors initial efforts aimed at extending the steady state freeway model for optimizing freeway traffic flow to a non-steady state model. The steady-state model does not allow reaction to continuously changing conditions which are often important. The non-steady state or dynamic model will allow this and is intended to be u
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This report is the first volume in a series of three volumes. The titles of the three volumes are: I, System Reference Manual; II, Example Problems; and III, Programming Aids. The material in this volume lists and describes the components of the System which include Bridge Design, Structural Inventory, Deck Design and Review. Structural Analysis, S
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This report presents a statistical summary of the cause and cost of bridge failures based only on a review of damage reports in the FHWA Emergency Relief files for major floods that have occurred during the last few years. As was anticipated, these reports yielded very limited reliable data, so the dollar projections must be viewed accordingly. The
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1973-08-01
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Nationwide Personal Transportation Survey (NPTS)
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PDF
The report discusses characteristics of home-to-work travel by various modes of transportation and by population size-group of the workers' place of residence. The first part of the report presents characteristics of the worker by place of residence and place of employment, and the characteristics of travel such as distance, time, daily home-to-wor
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The objectives of this research project were to develop improved design procedures and guidelines for major (i.e., Freeway-to-freeway) interchanges through the examination and analysis of existing design procedures and current freeway operational characteristics. Pertinent informantion was gathered through a review of the literature, conversations
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