United States. Department of Transportation. Federal Highway Administration. Office of Research, Development, and Technology
2007-08-01
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Epoxy-coated reinforcement (ECR) is the principal concrete reinforcing material currently in use in the United States in corrosive environments. The purpose of this study is to evaluate methods for making ECR more corrosion resistant by using multiple corrosion protection strategies in bridge decks, as well as for bridge members in marine environme
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This TechBrief summarizes a synthesis report on completed research and current American Association of State Highway and Transportation Officials (AASHTO) provisions related to lightweight concrete used in highway bridges. The synthesis report is intended to provide a reference point for an FHWA research program aimed at addressing perceived shortc
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United States. Federal Highway Administration. Center for Accelerating Innovation
2007-08-01
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Innovator, published by the FHWA Center for Accelerating Innovation, advances implementation of innovative technologies and processes in the highway industry. Its audience is transportation professionals in highway agencies, trade and research groups, academia and the private sector, and the driving public.
Successes in Stewardship is a Federal Highway Administration (FHWA) bimonthly newsletter highlighting current best practices in stewardship and environmental review from around the country.
The AASHTO LRFD Bridge Design Specifications and the AASHTO LRFD Bridge Construction Specifications were reviewed to identify provisions that affect the use of lightweight concrete. A synthesis of research relevant to the provisions was then compiled. Proposed research problem statements were developed to generate data to update the specifications
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United States. Department of Transportation. Federal Highway Administration. Office of Highway Policy Information
2007-08-01
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Traffic Volume Trends is a monthly report based on hourly traffic count data reported by the States. These data are collected at approximately 5,000 continuous traffic counting locations nationwide and are used to estimate the percent change in traffic for the current month compared with the same month in the previous year. Estimates are re-adjuste
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Cable-stayed bridges have become the form of choice over the past several decades for bridges in the medium- to long-span range. In some cases, serviceability problems involving large amplitude vibrations of stay cables under certain wind and rain conditions have been observed. This study was conducted to develop a set of consistent design guidelin
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The PPP Guidebook addresses the many participating groups, development phases, and institutional factors associated with transportation PPPs. It considers the full life-cycle of PPPs, from development to execution to performance reporting. It discusses statutory, regulatory, financial, and institutional issues that should be addressed to successful
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Continued growth in commerce and traffic congestion makes it difficult for industry to move freight economically without using larger and heavier loads. This trend challenges the effective and efficient monitoring of vehicle size and weight compliance. The Federal Highway Administration, American Association of State Highway and Transportation Offi
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The combination of continued travel growth and budget constraints makes it difficult for transportation agencies to provide sufficient roadway capacity in major metropolitan areas. The Federal Highway Administration, American Association of State Highway and Transportation Officials, and National Cooperative Highway Research Program sponsored a sca
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Eleven systems combining epoxy-coated reinforcement with another corrosion protection system are evaluated using the rapid macrocell, Southern Exposure, cracked beam, and linear polarization resistance tests. The systems include bars that are pretreated with zinc chromate to improve the adhesion between the epoxy and the reinforcing steel; two epox
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Deterioration of concrete bridges because of reinforcing steel corrosion has been recognized for 4-plus decades as a major technical and economic challenge for the United States. As an option for addressing this problem, renewed interest has focused on corrosion resistant reinforcements, stainless steels in particular. The present research study wa
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The idea of designing and building quieter pavements is not new, but in recent years there has been a groundswell of interest in making this a higher priority. Various State Highway Agencies and the Federal Highway Administration have responded accordingly with both research and implementation activities that both educate on the state-of-the-practi
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The delays arising from traffic congestion are a fact of life in many communities. According to a February 2007 Harris Poll, just over one-third (37 percent) cite traffic congestion as a serious problem in the community, while one-quarter say traffic congestion is a serious problem that is not being addressed. Close to half of all congestion happen
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United States. Department of Transportation. Federal Highway Administration
2007-07-01
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Focus: Accelerating Infrastructure Innovations
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Focus (ISSN 1060-6637), which is published monthly by the U.S. Department of Transportation’s Federal Highway Administration (FHWA), covers the implementation of innovative technologies in all areas of infrastructure. Its primary mission is twofold: (1) to serve the providers of highway infrastructure with innovations and support to improve the qua
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A road safety audit (RSA) is a formal safety examination of a future roadway plan or project or an in-service facility that conducted by an independent, experienced multidisciplinary RSA team. All RSAs should include a review of pedestrian safety; however, some RSAs may be conducted to improve an identified pedestrian safety problem. The Pedestrian
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This report summarizes the findings of the Advanced Quality Systems Workshop held in Washington D.C. in November of 2006. The workshop was sponsored by the FHWA and brought together a number of key quality researchers and practitioners. The objective of the workshop was to generate discussion on what exactly constitutes an Advanced Quality System a
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Learning in Progress, NHI's quarterly newsletter, provides updates on new course launches, upcoming Web conference seminars, training programs and events, and NHI policy changes.
In June of 2005, the Federal Highway Administration (FHWA) entered into an agreement to study the emissions of several air toxics compounds emitted by vehicles in close proximity to roadways. This study is based on several studies, which have shown that the concentrations of some emissions return to background concentrations within 1000 feet from r
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