The purpose of this project was to conduct a survey of the literature and state of the art related to bicycle route selection and designation and to develop a synthesized set of factors for use by State and local transportation officials and other agencies and organizations involved in the selection and designation of streets and highways for bike
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This Implementation Package is a practical guide for the creation and restoration of wetlands. It provides concepts, methods and general specifications for compensating unavoidable wetland losses in a cost effective manner. The manual includes guidance for wetland establishment and enhancement and provides information for the conceptual design of w
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This Guide presents information required by programmers to understand or modify the program logic of TWOPAS, a microscopic computer simulation model of traffic on two-lane, two-way highways. The TWOPAS model simulates traffic operations on two:- lane highways by reviewing the position, speed, and acceleration of each individual vehicle on a simulat
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The Highway Safety Acts of 1973 and 1976 and the Surface Transportation Acts of 1978 and 1982 provide funding authorizations for individual states to improve safety at public rail-highway crossings. Safety improvements frequently consist of the installation of active motorist warning devices such as flashing lights or flashing lights with gates. To
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United States. Department of Transportation. Federal Highway Administration
1986-07-01
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PDF
To prescribe for Federal-aid construction contracts, Required Contract Provisions covering employment, record of materials and supplies, subletting or assigning the contract, safety, false statements concerning highway projects, termination of contract, and implementation of the Clean Air Act, and Federal Water Pollution Control Act, and to prescri
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Dynamic compaction has been found to produce densification in certain natural and fill deposits to depths varying from 10 to 35 ft below grade and has an application for highway construction. This manual, Volume I, presents the "State of the Art" of dynamic compaction. The information contained herein was assembled from published articles, actual j
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This study has determined the influence of variations in truck size and weight constraints on the stability and control properties of heavy vehicles. The size and weight constraints of interest include axle load, gross vehicle weight, length, width, type of multiple-trailer combinations, and bridge formula allowances. Variations in location of the
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The Proposed Design Specifications for Steel Box Girder Bridges as contained in Report No. FHWA-TS-80-205 are evaluated. The results of comparative designs done using the AASHTO code and the proposed specification are summarized. The differences in the designs are explained with reference to the differing design requirements of the two specificatio
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Bridges and culverts with openings measuring more than 20 feet (6m) parallel to the centerline of the roadway are inspected on a two year cycle in accordance with National Bridge Inspection Standards. The structural and hydraulic design of culverts is substantially different from bridges as are the construction methods, durability considerations, a
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Bridges and culverts with openings measuring more than 20 feet (6m) parallel to the centerline of the roadway are inspected on a two year cycle in accordance with National Bridge Inspection Standards. The structural and hydraulic design of culverts is substantially different from bridges as are the construction methods, durability considerations, a
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tations. Profile computations for open-channel flow are compatible with conventional techniques used in existing step-backwater analysis models. WSPRO incorporates several desirable features from existing models. Profile computations for freesurface flow through bridges are based on relatively recent developments in bridge backwater analysis and re
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This report presents an evaluation of the operational effectiveness of passing lanes on two-lane highways in level and rolling terrain. Passing lanes are defined as added lanes in one or both directions of travel on a two-lane highway to provide additional passing opportunities. Passing lanes at intervals on a two-lane highway are a lower-cost alte
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The chemical reactions and reaction kinetics of asphalt modified with a patented modifier supplied by Chemkrete Technologies, Inc. were investigated. The modifier, a manganese-carboxylic acid complex, has been shown to cause a rap; d react; on with atmospheric oxygen when the modified asphalt is exposed as thin films. This reaction produces paving
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This report provides specific procedures for the seismic design of bridge foundations and abutments based on hand-calculation methods using design charts and computer methods. This report supplements the "Seismic Design Guidelines for Highway Bridges" published as a design specification by the American Association of State Highway and Transportatio
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Traffic Control for Reversible Flow Two-Way Left-Turn Lanes; Integrated Information Systems for Better Data Management; Accident Costs for Highway Safety Decision making; State-of-the-Art Pile Load Test Program for the Third Lake Washington Bridge
This Guide presents information required to use TWOPAS a microscopic computer simulation model of traffic on two-lane, two-way highways. The TWOPAS model simulates traffic operations on two-lane highways by reviewing the position, speed, and acceleration of each individual vehicle on a simulated roadway and advancing those vehicles along the roadwa
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Expectancy relates to a driver's readiness to respond to situations, events, and information in predictable and successful ways. It influences the speed and accuracy of information handling, and affects all aspects of highway design and operations, and information presentation.Aspects of the highway situation that are in accordance with prevalent e
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