This report explains the OHIM survey methodology and the DRI methodology of tabulation of responses; presents the findings of the survey by type of respondent and for specific tables; and provides DRI's recommendations as a result of its review of comments.
KEYWORDS:RESEARCH AND DEVELOPMENTTHERMAL CUTTING IS A PROCEDURE THAT IS INTEGRAL TO THE MANUFACTURE AND FABRICATION OF STEEL. THERMAL CUTTING IS PARTICULARLY IMPORTANT IN THE PRODUCTION OF PLATE STEELS, WHERE IT IS COMMONLY USED FOR TRIMMING THE AS-ROLLED PLATE TO THE REQUIRED RECTANGULAR DIMENSIONS.THE INFLUENCE OF THE HEAT-AFFECTED ZONE GENERATED
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The SmarTraveler operational test was chosen by the Federal Highway Administration to be the subject of a case study. Several case studies were performed under the Intelligent Transportation Systems (ITS) Institutional and Legal Issues Program, which was developed in response to the Intermodal Surface Transportation Efficiency Act of 1991. The obje
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To better prepare for the task of identifying advanced technologies that may be incorporated in future highway systems, a scanning team was assembled to survey European planning and applications of advanced technologies, seeking knowledge that might aid us in the United States. This advanced technology scanning team was drawn from our Federal and S
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Geographic display of Census data in transportation planning and policy decisions are compiled in a report of 49 maps, depicting use of the data in applications such as travel demand model development and model validation, population forecasting, corridor analysis, and transit route planning. The report has compiled maps from many different types o
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Static and dynamic legibility studies were conducted to investigate the effects of level of reflectivity, letter series, stroke width, letter spacing, font, letter height, and driver age. The dynamic study also considered the effect of sign size and retroreflectivity on the level of conspicuity. As expected, driver age had the largest effect on bot
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This report summarizes existing pavement condition indices, and available prediction models for each condition index. This report also identifies existing data bases, where the required variables for the prediction models have been collected. Successive chapters detail: the condition indices and their prediction models; the selected data bases (HPM
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This instructor's guide is developed for a 3- to 6- hour long workshop on surface rehabilitation techniques for asphalt pavements. This workshop will be useful to FHWA, State, and local highway engineers and managers involved with the selection, design, and construction of thin surface rehabilitation techniques. Nearly all highway agencies use some
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The National Science Foundation (NSF) and the Federal Highway Administration (FHWA) recently set up a system of National Geotechnical Experimentation Sites (NGES) available to the geotechnical community at-large for the purpose of advancing the state of the art in such areas as in situ testing, field instrumentation, and prediction of soil behavior
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The objectives of the FHWA Curved Steel Bridge Program are (1) to conduct fundamental research into the structural behavior of curved steel flexural members and bridges, and (2) to address construction issues, in order to provide adequate information to develop and clarify design specifications. The work under this program is a coordinated effort b
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The primary objective of this program was to demonstrate that the Oregon Graduate Institute (OGI)-developed electroslag welding (ESW) technology cay be successfully implemented in commercial fabrication shops. Consequently, opportunity was provided to evaluate the transferability of ESW technology and to develop additional ESW mechanical property d
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The primary objectives of this program were to develop a welding procedure for repair of electroslag weldments and to determine if repair welding influenced the fatigue strength of electroslag weldments. Integral to this effort was the identification of the most likely types of defects, their causes, and the potential for effective repair. The elec
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The purpose of this study was to determine the layer (a) coefficients for several commonly specified materials used in MHTD designed pavements for use in the 1986 AASHTO Guide pavement design method. The project entailed a review and compilation of published literature, laboratory testing, analysis of results, and preparation of this report. The st
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1994-12-01
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Nationwide Personal Transportation Survey (NPTS)
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PDF
This document is one of three volumes that have been produced as a set, containing topical papers from the Nationwide Personal Transportation Survey, NPTS. These volumes represent something of a departure from standard approaches to reporting the NPTS. Traditionally, the survey results have been reported in large volumes with an extensive series of
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The report summarizes the efforts and progress made to date by the Department of Transportation (DOT) and focuses specifically on the Federal Highway Administration's (FHWA's) implementation of important financing initiatives in President Clinton's Executive Order 12893 of January 26, 1994. The purpose of Executive Order is to enhance existing prog
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To address the growing problem of congestion caused by incidents, especially truck-involved incidents, this study was undertaken to identify truck accident countermeasures which have been used nationwide. Desired conditions surrounding implemented countermeasures in this study included urban freeway volumes of 95,000 vehicles per day or higher, a s
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This report is the final (draft) in a series describing an effort to determine a viable approach to ensuring that the elements of such an Automated Highway System (AHS) are ensured operational, or healthy. The system which performs this assessment, and intervenes if an element is found wanting, we will term a Health Management System. Assessing the
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