U.S. Department of Transportation
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC 20590
Federal Highway Administration Research and Technology
Coordinating, Developing, and Delivering Highway Transportation Innovations
This magazine is an archived publication and may contain dated technical, contact, and link information.
|Publication Number: FHWA-HRT-05-007 Date: September/October 2005|
Publication Number: FHWA-HRT-05-007
Issue No: Vol. 69 No. 2
Date: September/October 2005
Below are brief descriptions of products recently published online by the Federal Highway Administration's (FHWA) Office of Research, Development, and Technology. Some of the publications also may be available from the National Technical Information Service (NTIS). In some cases, limited copies are available from the Research and Technology (R&T) Product Distribution Center.
When ordering from NTIS, include the NTIS publication number (PB number) and the publication title. You also may visit the NTIS Web site at www.ntis.gov to order publications online. Call NTIS for current prices. For customers outside the United States, Canada, and Mexico, the cost is usually double the listed price. Address requests to:
5285 Port Royal Road
Springfield, VA 22161
Toll-free number: 800-553-NTIS (6847)
Address requests for items available from the R&T Product Distribution Center to:
Federal Highway Administration
9701 Philadelphia Court, Unit Q
Lanham, MD 20706
For more information on research and technology publications from FHWA, visit the Turner-Fairbank Highway Research Center's (TFHRC) Web site at www.fhwa.dot.gov/research/tfhrc/, FHWA's Web site at www.fhwa.dot.gov, the National Transportation Library's Web site at http://ntl.bts.gov, or the OneDOT information network at http://dotlibrary.dot.gov.
The FHWA Office of Research, Development, and Technology (RD&T) recently released its third annual performance report to the American public and its stakeholders in the transportation community. The report reflects the office's efforts to identify new and improved ways to provide high-quality research products and technology services to its customers.
Without a budget or long-term authorization in place for the fiscal year, the Research and Technology (R&T) Program overcame many challenges to attain the notable accomplishments highlighted in the report. Among its successes, the office developed more than 60 multiyear program plans to provide direction for future R&T activities, and created a new exhibit to showcase FHWA's priority market-ready technologies and innovations at the Transportation Research Board's annual meeting and the American Association of State Highway and Transportation Officials' Research Advisory Committee meeting.
The first section of the report describes the office's business philosophy and workforce composition, giving special attention to its role in the community and the impact it makes through outreach and special events. The report then highlights the strategic framework of RD&T, including its vision, mission, goals, and "vital few" priorities of safety, congestion mitigation, and environmental stewardship and streamlining. A third section features the results of the office's business endeavors, including delivering needed products and services and assessing the performance of each laboratory at TFHRC. The final portion of the document showcases techniques for performance management, such as conducting case studies on the benefits of research and obtaining feedback from customers. Several appendices provide additional information on RD&T services, outreach activities, technologies, and partnerships.
This final report discusses the implementation of an FHWA soil model into the dynamic finite element code, LS-DYNA®. FHWA developed Soil Material Model 147 to predict the performance of foundation soil in which roadside safety structures are mounted, particularly in cases where those structures may be struck by a motor vehicle. The model is applicable for all soil types when one surface is exposed to the elements if the appropriate material coefficients are inserted. When the appropriate material coefficients are inserted, the model is applicable to all soil types when one surface is exposed to the elements.
The researchers divided the report into three sections: (1) the research plan, which describes the justification and the detailed theory of the model; (2) the user's manual, which was submitted for inclusion in the LS-DYNA user's manual; and (3) examples that show the expected results of the model. The companion report to this manual is Evaluation of LS-DYNA Soil Material Model 147 (FHWA-HRT-04-094).
This report, the companion document for Manual for LS-DYNA Soil Material Model 147 (FHWA-HRT-04-095), discusses the soil material model's performance and the accuracy of the results it produced when implemented in simulations using LS-DYNA for roadside safety applications. The evaluation concentrates on the use of parameters to derive optimal results from the model, highlighting the importance of obtaining appropriate parameter values through testing or analysis, providing an engineering understanding of the parameters, and determining boundaries for the potential effects of varying the parameters. Although Model 147 requires further development before it can be used in most roadside safety applications, this report provides a springboard for future improvements.
This guide provides a single, comprehensive information source on methods for evaluating the safety and operation of signalized intersections and tools to remedy deficiencies. The treatments featured in the guide range from low-cost measures, such as improvements to signal timing and signage, to higher cost measures, such as intersection reconstruction and grade separation.
The guide covers the fundamental principles of user needs, geometric design, and traffic design and operation; safety and operational analysis techniques; and a variety of treatments to address existing or projected problems, including individual movements and approaches, pedestrian and bicycle treatments, and corridor techniques. In addition, the document covers alternative strategies that improve intersection performance through the use of indirect left turns and other treatments. With the description of each treatment, the guide also presents discussions of safety, operational performance, multimodal issues, and physical and economic factors that practitioners should consider. Although the guide focuses primarily on high-volume signalized intersections, many treatments are applicable for lower volume intersections as well.
The information contained in the guide is based on the latest available research on treatments and best practices in use by jurisdictions across the United States. Additional resources and references are highlighted for students, practitioners, researchers, or decisionmakers who want to learn more about a particular subject.
The freight transportation industry and its customers use information technologies and telecommunications to improve efficiency and productivity, increase global connectivity, and enhance security against common threats and terrorism. In short, these technologies help practitioners operate the transportation system more intelligently. Most importantly, they do so in ways that improve safety.
The Freight Technology Story discusses advancements in these technologies and describes how they work and the benefits they deliver, including results from the U.S. Department of Transportation's field operational tests and other initiatives involving intelligent freight technology. The report also discusses the implementation of freight technologies and the technical and institutional barriers to their acceptance.
Intelligent freight technologies are currently deployed in several areas:
The report highlights the benefits of deploying intelligent freight technologies, not only for the private and public sectors, but also for the economy as a whole.
For more information or to view the report, visit the Office of Freight Management and Operations Web site at www.ops.fhwa.dot.gov/freight/intermodal or contact Mike Onder at firstname.lastname@example.org.
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Free copies are distributed to offices of the Federal Highway Administration, State highway agencies, technology transfer centers, and selected leaders who have responsibility for highway-related issues. Most of these copies are mailed to offices for their internal distribution or to people by position title rather than by name. If any office or individual subscriber in this category has a change of address, please send the complete previous mailing address and the complete new address to our distribution manager, Martha Soneira, via e-mail (email@example.com), telephone (202-493-3468), or mail (Martha Soneira, PUBLIC ROADS Distribution Manager (HRTS), Federal Highway Administration, 6300 Georgetown Pike, McLean, VA, 22101-2296).
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