The MOVES Regional Level Sensitivity Analysis was conducted to increase understanding of the operations of the MOVES Model in regional emissions analysis and to highlight the following:the relative sensitivity of selected MOVES Model input parameters when compared to national default values.relationships between specific variables and their effects
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In March 2010, a large field test study was conducted on a stereo pedestrian detection system in four cities in four States under the Federal Highway Administration's Small Business Innovative Research program. The objective was to prove that the stereo vision would reliably detect pedestrians in real-world environments under all weather conditions
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This study examined the roughness and roughness progression of 21 test sections on the LTPP SPS-2 site in Arizona over the first 16 years of the experiment. The site included 12 test sections from the standard experiment and 9 supplemental test sections selected by the Arizona Department of Transportation. Traditional profile analyses revealed roug
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Between 2005 and 2009, single-vehicle run-off-road (ROR) crashes on two-lane rural-roadway horizontal curves have resulted in an average of 4,748 fatalities per year. Driving while familiar with the roadway, inattentive, and in a hurry have been identified as factors that increase the likelihood of these crashes. The goal of the present study was t
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This report discusses work done on the specification and characterization of fiber - reinforced polymer laminate materials used for the trapezoidal profile used in creating a replacement deck unit.
Traffic incidents are a major source of congestion in both urban and rural areas. Nationally, roughly 25 percent of total congestion is due to traffic incidents. Further, traffic incidents create unexpected congestion - congestion that occurs in times and places where travelers don't expect to be delayed - and are therefore a major source of frustr
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This Technical Brief provides an overview of the implications of the use of sulfur as a modifier/extender for asphalt concrete mixtures and the relationship to asphalt pavement performance.
The FHWA has been leading a national effort to advance the Intelligent Compaction (IC) technology through a transportation pooled funded project, TPF-5(128), with twelve (12) States (DTFH61-07-C-00032) since 2008. Under this project, the Transtec Group has conducted seventeen (17) field IC demonstrations successfully to address material types that
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Asphalt prices, supply issues, and growing interest in sustainable construction practices are leading to increased use of reclaimed asphalt pavement (RAP) in greater amounts and in more types of mixes. When using more than 15–20 percent RAP under most current specifications (State and national), contractors must change the virgin binder grade added
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The growth of major metropolitan areas over the last century has resulted in the emergence of “mega-regions”—a large network of urban areas that often develop along major transportation routes. Expected to form an essential role in the future global economy, new analysis tools are needed to operate these mega-regional transportation networks effici
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Primer offers transportation planners and operations managers a menu of opportunities for applying the regional ITS architecture to enhance planning for operations. It provides specific entry points for leveraging the regional ITS architecture in integrating operations into the planning process. This primer centers on the use of an objectives-drive
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This report examines the concept of asset sustainability metrics. Such metrics address the long-term performance of highway assets based upon expected expenditure levels. It examines how such metrics are used in Australia, Britain and the private sector. It also reviews asset management data from selected states to illustrate that long-term sustain
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This report summarizes the proceedings of the Asset Management Peer Exchange hosted by the Federal Highway Administration (FHWA) and the American Association of State Highway and Transportation Officials (AASHTO). The peer exchange was held in San Diego, CA on April 19, 2012. The peer exchange addressed various aspects of asset management implement
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