A study was made of the condition of prestressed concrete PS/C bridge elements located in adverse, potentially corrosive environments. A total of five bridges were subjected to detailed surveys. Additional structures were surveyed visually and given limited investigation. Bridges were located both in northern climates subjected to application of ro
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Extensive field, laboratory and analytical studies were conducted into the evaluation and rehabilitation of concrete pavements. Field studies included over 350 rehabilitated pavement sections throughout the U.S., and the construction of two field experiments. A laboratory study was conducted on anchoring dowels in full-depth repairs. Analyses of fi
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This study was conducted to characterize and compare currently available rigid pavement analysis models and design methods and to develop new rigid pavement designs to be evaluated in full scale experimental projects in an actual highway environment. The analysis models considered include: ILLI-SLAB, JSLAB, WESLIQID, WESLAYER, JCS-1, H51, CRCP-2, a
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On July 12-13, 1988 the Office of Research, Development and Technology of the Federal Highway Administration hosted a forum on Weathering Steel for Highway Structures. This conference took place at the Ramada Hotel in Alexandria, Virginia. The major objectives of this forum were to examine the state of the art in weathering steel use and maintenanc
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Implementation of Seismic Design and Retrofit Procedures for Highway Bridges; Getting Started—Selecting and Using Computerized Traffic Models; Corrosion and Weathering Steel Bridges; Expert System for Pavement Maintenance Management
This report describes the development of a prototype magnetic perturbation NDE system for inspecting and monitoring structural cables and strands of suspension bridges. Although this method had been applied successfully to a variety of NDE problems, including small diameter cables, the application to larger diameter cables was an extremely difficul
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The Preliminary Analysis System for Water Surface Profile Computations (PAS) - User's Manual describes and illustrates the use of a microcomputer program to assist in stream geometry data development for water surface profile computations. The program implements the findings of the research project "Accuracy of Computed Water Surface Profiles," (Hy
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The purpose of the research presented in this report was to design and construct an instrumented wall which is capable of measuring the impact forces associated with heavy vehicle impacts. The design of the instrumented wall was based on the design of a previous one which was developed to measure the impact forces associated with lighter vehicles.
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The Finite Element Surface-Water Modeling System: Two-Dimensional Flow in a Horizontal Plane (FESWMS-2DH) is a modular set of computer programs that simulate surface-water flow that is essentially two-dimensional in a horizontal plane. The modeling system was developed to analyze primarily flow at highway bridge crossings where complicated hydrauli
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The variable speed limit (VSL) system is designed to display both the maximum and minimum speed boundaries based on measured traffic and environmental conditions. In addition, short driver information messages can be displayed to warn of down stream conditions. The VSL can be installed to operate independently (Isolated), in a series of stations (L
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The OPAC strategy is an on-line traffic signal control algorithm designed to optimize the performance of traffic signals at isolated intersections using delay as the performance criterion. OPAC-RT is a traffic signal control system which implements the OPAC strategy in real time. The system uses traffic data collected from detectors located well up
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This report contains the results of tests performed to validate the FHWA FOIL bogie vehicle as a surrogate for testing coupling-mounted sign and luminaire supports. The tests were performed at the FOIL located in McLean, Virginia. Vehicle tests using 1979 Volkswagen Rabbits were compared with tests using the FHWA FOIL bogie. The comparisons include
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The project discussed in this report concerned the night use of overhead guide signs, including button and reflectorized copy and all practical combinations of reflectorized and opaque backgrounds. This project was a follow-up effort to the literature review by Gordon. Gordon's review found areas requiring further investigation, including the compa
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Selected data on highway toll facilities in the United States are contained in Table T-1 of this report based on a survey of facilities in operation, financed, or under construction as of January 1, 1989. The data include information such as the name, financing or operating authority, location and termini, feature crossed, length, and road system f
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This report describes a study of motorist compliance with standard traffic controldevices. The research included a comprehensive review of past studies, contactswith traffic, law enforcement, and department of motor vehicles personnel, and ana?sessment of the viability of other information sources for identifying andquantifying motorist noncomplian
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United States. Federal Highway Administration. Construction and Maintenance Division
1989-04-01
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The material, presented in this workshop is to be addressed as if the Federal Highway Administration (FHWA) field engineer is actually conducting an inspection of flexible pavement construction. It covers the necessary preparation, critical construction inspection points, potential problems, and the solutions to these problems. The workshop is buil
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This manual presents an overview, user instructions and technical backup for the computer program PIPECAR. PIPECAR is a program for the structural analysis and design of circular and horizontal reinforced concrete pipe. It has been written to run on IBM or IBM compatible microcomputers. Th input routines are user friendly; only minimal experience w
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