This report presents an assessment of the Long-Term Pavement Performance (LTPP) SPS-7 experiment. This report is intended to serve as background material for a meeting of State agencies to be held to review the status of the SPS-7 experiment. The four SPS-7 projects are described in detail and an assessment is provided on the availability and quali
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SUPERPAVE binders are selected based on the lowest and highest pavement temperatures expected at a job. The original SUPERPAVE specifications were developed with limited data for validating the low-temperature algorithm for pavement temperatures. The 10WEJst air temperature was assumed for the lowest pavement temperature. In areas with extremely lo
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United States. Department of Transportation. Bureau of Transportation Statistics
1998-09-01
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Journal of Transportation and Statistics
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PDF
The Journal of Transportation and Statistics (JT&S) was a periodically issued journal (from 1998 to 2014) that served the transportation community by increasing the understanding of the role of transportation in society, its function in the economy, and its interactions with the environment. In addition, the JT&S provided a forum for the latest dev
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United States. Department of Transportation. Federal Highway Administration
1998-08-27
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PDF
The GT-16 is a summary of the NCHRP 21-5 interim report of the same title prepared by Messrs. Larry D. Olson, Farrokh Jalinoos, and Marwan F. Aouad. The purpose of GT-16 is to provide bridge owners with interim information on available nondestructive test (NDT) methods for assessing unknown bridge foundations.
The Rural Public Transportation Technologies: User Needs and Applications Study was conducted as part of the U.S. DOT's overall Rural Intelligent Transportation System (ITS) Program. The study examined the opportunities and challenges of planning and deploying advanced public transportation systems (APTS) technologies in rural and small urban areas
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A major shortcoming of many travel demand models is the lack of attention and effort placed on the validation phase of model development. Validation involves testing the model's predictive capabilities. Travel models need to be able to replicate observed ;Prepared in cooperation with Cambridge Systematics, Inc., Washington, DC. and Environmental Pr
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The Rural Public Transportation Technologies: User Needs and Applications Study was conducted as part of the U.S. DOT's overall Rural Intelligent Transportation System (ITS) Program. The study examined the opportunities and challenges of planning and deploying advanced public transportation systems (APTS) technologies in rural and small urban areas
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For nearly half a century transportation planners have been making use of increasingly complex computer models for forecasting the consequences of construction of, and modifications to, transportation systems. For most of that time, and in the majority of instances, the inputs, especially the employment, household, and land use inputs, to their for
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This two-day workshop was developed by Federal Highway Administration (FHWA) staff to facilitate the implementation of life-cycle cost analysis (LCCA) in pavement design. This workshop will be of interest to State highway agency personnel responsible for conducting and/or reviewing pavement design LCCAs. The FHWA Office of Engineering, Pavement Div
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United States. Department of Transportation. Federal Highway Administration
1998-08-01
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PDF
This participant's notebook was developed by FHWA staff to compliment a 2-day workshop on life cycle cost analysis in pavement design. This workshop will be of interest to State highway agency personnel responsible for conducting and/or reviewing pavement design LCCAs. The FHWA Office of Engineering, Pavement Division, in cooperation with the Offic
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Mitretek Systems. Center for Telecommunications and Advanced Technology
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1998-08-01
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PDF
This is one of a series of documents providing support for deploying Intelligent Transportation Systems (ITS). This document focuses on traveler information systems, a component of ITS. It aims to provide practical help for the transportation community with deploying traveler information systems in an integrated, multimodal environment using the Na
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Mitretek Systems. Center for Telecommunications and Advanced Technology
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1998-08-01
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PDF
This is one of a series of documents providing support for deploying Intelligent Transportation Systems (ITS). This series addresses Traffic Signal Control Systems, Freeway and Incident Management Systems, Transit Management Systems, and Traveler Information Systems. The National ITS Architecture provides a common structure for deploying these syst
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While all law enforcement agencies seem to be dealing with declining resources and increasing pressures to combat crime, urban police departments seem to be experiencing the greatest difficulty. It is in these agencies where the decline in crash reporting has started. However, State law enforcement has also experienced funding reductions, while als
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This report presents a basic overview and assessment of different concepts and technologies of using polymer composites in structures generally used for highway safety. The structural systems included a highway barrier guardrail with its posts and blockouts, sign posts, concrete reinforcing rebars, breakaway couplers, and crushable plastic cushions
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To provide a better understanding of how short-duration truck volume counts can be used to accurately estimate the key variables needed for design, planning, and operational analyses, the Long-Term Pavement Performance (LTPP) program recently completed a study entitled "Vehicle Volume Distributions by Classification" (FHWA-PL-97-025, June 1997). Th
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The purpose of this TechBrief is to discuss one of the Long Term Pavement Performance (LTPP) program's stringent data requirements - site-specific measurements for estimating pavement loadings - and to illustrate the effects of traffic loading data error on LTPP's ability to develop accurate and reliable design equations. This TechBrief is based on
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This tech brief presents an FHWA study that addressed the adequacy of both public and private parking facilities nationwide. The steady growth in trucking nationwide appears to have increased the demand for rest areas along the nation's highways. Commercial drivers need a safe place to park, especially at night, to maintain their alertness. A growi
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United States. Department of Transportation. Federal Highway Administration. Office of Research and Development
1998-08-01
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PDF
Roughness is widely regarded as the most important measure of pavement performance because it is the measure most evident to the traveling public. It greatly affects ride quality, safety, and vehicle operating costs. Therefore, understanding how and why roughness occurs in pavements is of major concern to highway agencies. To this end, the Long Ter
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