The research documented in this report involved a review of legal and insurance issues relative to off-site accident investigation locations, referred to as Accident Investigation Sites (AISs), through library searches and contact with a limited number of individuals, organizations, and agencies involved in the coordination or administration of leg
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This report provides basic information for 1987 from each State on road-user tax.es and property taxes levied on a selected group of vehicles, The intent is neither to weigh the merits of any of the taxes being reviewed nor to recommend any tax policy, but to supply the means to measure and compare the annual payments that would be made for each of
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To accomplish this mission, the FHWA works closely with State highway agencies, transportation associations, and private consultants throughout America. This partnership has created a network of engineers, scientists, administrators, and other technical personnel with extensive knowledge of building and maintaining viable highway systems. A wealth
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This report presents the implementation and evaluation of four techniques for improving the effectiveness of speed zoning in construction areas on multi-lane freeways. The techniques are (a) the flagging procedure of the "Manual on Uniform Traffic Control Devices" (MUTCD), (b) the use of the MUTCD flagging procedure as well as motioning motorists t
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The urban transportation planning process is undergoing critical transformations. Of particular interest is the emergence of private sector involvement in the planning, management, financing, construction of transportation systems and provision of transit services. The objectives of this study, financed by the Federal Highway Administration (FHWA)
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This documentation serves as a user's guide for the interactive microcomputer version of ELSYM5. This version contains interactive input and output processors designed to assist the user in the development of data files. ELSYM5 will determine the various component stresses, strains, and displacements along with principal values in a three-dimension
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The report reviews the operational experience of the three principal types of Changeable Message Signs (CMS) used on freeways and Interstate highways in the continental United States. The three types examined here are the light bulb matrix, rotating drum, and disc matrix. These types have experienced only minor technical improvements since their in
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Bridge deck design, at present, often includes costly bridge deck drainage provisions. Many bridge engineers have questioned the need for bridge deck drainage appurtenances, at least to the extent presently included in typical bridge design. This document presents criteria to determine if bridge drainage scuppers and drains are required. A design n
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This document provides abstracts on audiovisual aids of potential interest to highway safety and traffic engineers. Each film abstract includes: a description of the film's contents; the source(s) from which it is available for purchase, rental, or loan; the format(s) in which it is available; the length of the film (or number of slides); and, wher
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This is a user's manual to aid in the selection of effect-effective countermeasures for utility pole accidents. A manual cost-effectiveness procedure was developed which utilized graphs, charts, and tables to allow for comparing accident benefits and project costs for such projects as undergrounding utility lines, pole relocation, breakaway poles,
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The Use of Oil and Gas Field Brines as Highway Deicing Agents; Road Humps for the Control of Vehicular Speeds and Traffic Flow; The Arterial Analysis Package
This guide to management of roadside trees was prepared for local and State authorities responsible for maintaining roads. This revised guide is a result of field testing during 1984-85 as part of an evaluative study to determine the ease or difficulty in using this step-by-step approach. Following years of research by the Michigan Department of Tr
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A study was undertaken on the performance of pile driving systems and the existinytechnology for the measurement of performance parameters was reviewed, This reportis an inspection manual for use by pile driving inspectors and engineers to ascertainthat the pile hammer conforms to certain minimum standards, and to record observationson hammer and d
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Sodium chloride is currently used to remove ice from roads. While cheap, sodium chloride is corrosive and contaminates ground water and streams. The Department of Transportation under the aegis of the Federal Highway Administration (FHWA) began a search for a sodium chloride substitute. Calcium magnesium acetate (CMA) has been identified as an exce
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Riparian and watershed restoration and enhancement has gained the spotlight in recent years. Effective restoration techniques are not often well understood. The Forest Service began a program of watershed restoration about 10 years ago. The focus of this effort was to "keep the water on the mountain" and as a result improve riparian habitat. The ob
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