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| Author | : A. T. Papagiannakis |
| Publisher | : Transportation Research Board |
| Total Pages | : 413 |
| Release | : 2008 |
| Genre | : Motor vehicle scales |
| ISBN | : 0309098157 |
| Author | : National Cooperative Highway Research Program (Etats-Unis) |
| Publisher | : |
| Total Pages | : 55 |
| Release | : 2008 |
| Genre | : |
| ISBN | : |
| Author | : A. T. Papagiannakis |
| Publisher | : |
| Total Pages | : 7 |
| Release | : 2010 |
| Genre | : Calibration |
| ISBN | : |
This paper provides a summary of the weigh-in-motion (WIM) calibration practices used by state highway and load enforcement agencies in the United States. The detailed statistical data presented were collected through a web-based survey questionnaire. It covers three common WIM calibration practices, namely utilizing multiple passes of test trucks, utilizing traffic stream vehicles of known static weight, and employing only WIM data quality control (QC) techniques. To put the actual practice in perspective, an overview is provided of the current WIM calibration standard (ASTM E1318-02) and the new provisional standard for quantifying pavement roughness at the approach to WIM systems (AASHTO MP 14-05). Most agencies use a combination of two or more of these methods for WIM system calibration. The majority of agencies uses WIM data QC on a routine basis and they resort to one of the other two calibration methods when WIM data quality deteriorates. Test truck calibration typically involves one or two Class 9 trucks running at several speeds. Few of these agencies, however, perform actual pavement roughness measurements on the approach to the WIM sites. Agencies that use traffic stream vehicles of known static weight for WIM calibration obtain static weights manually using permanent static scales. The method involves up to 100 trucks selected by class, speed or both class and speed. Agencies use a variety of traffic elements and formulas for computing calibration factors. Similarly, a variety of traffic data element errors are computed and various approaches are used for computing calibration factors. In the light of these findings, the paper provides a number of recommendations for improving current WIM calibration practices.
| Author | : |
| Publisher | : ScholarlyEditions |
| Total Pages | : 735 |
| Release | : 2012-01-09 |
| Genre | : Education |
| ISBN | : 1464965536 |
Issues in Teaching and Education Policy, Research, and Special Topics: 2011 Edition is a ScholarlyEditions™ eBook that delivers timely, authoritative, and comprehensive information about Teaching and Education Policy, Research, and Special Topics. The editors have built Issues in Teaching and Education Policy, Research, and Special Topics: 2011 Edition on the vast information databases of ScholarlyNews.™ You can expect the information about Teaching and Education Policy, Research, and Special Topics in this eBook to be deeper than what you can access anywhere else, as well as consistently reliable, authoritative, informed, and relevant. The content of Issues in Teaching and Education Policy, Research, and Special Topics: 2011 Edition has been produced by the world’s leading scientists, engineers, analysts, research institutions, and companies. All of the content is from peer-reviewed sources, and all of it is written, assembled, and edited by the editors at ScholarlyEditions™ and available exclusively from us. You now have a source you can cite with authority, confidence, and credibility. More information is available at http://www.ScholarlyEditions.com/.
| Author | : Christiane Raab |
| Publisher | : Springer Nature |
| Total Pages | : 955 |
| Release | : 2020-06-19 |
| Genre | : Technology & Engineering |
| ISBN | : 3030486796 |
This book gathers the proceedings of an international conference held at Empa (Swiss Federal Laboratories for materials Science and Technology) in Dübendorf, Switzerland, in July 2020. The conference series was established by the International Society of Maintenance and Rehabilitation of Transport Infrastructure (iSMARTi) for promoting and discussing state-of-the-art design, maintenance, rehabilitation and management of pavements. The inaugural conference was held at Mackenzie Presbyterian University in Sao Paulo, Brazil, in 2000. The series has steadily grown over the past 20 years, with installments hosted in various countries all over the world. The respective contributions share the latest insights from research and practice in the maintenance and rehabilitation of pavements, and discuss advanced materials, technologies and solutions for achieving an even more sustainable and environmentally friendly infrastructure.
| Author | : Bernard Jacob |
| Publisher | : John Wiley & Sons |
| Total Pages | : 534 |
| Release | : 2013-03-04 |
| Genre | : Technology & Engineering |
| ISBN | : 1118623274 |
Weigh-in-motion (WIM) is a process of measuring the dynamic tire forces of a moving vehicle and estimating the corresponding tire loads of the static vehicle. This collection of lectures from the International Conference on Weigh-in-Motion details applications such as: collection of statistical traffic data, support of commercial vehicle enforcement, roadway and bridge cost allocation, and traffic management.
| Author | : J. M. Zuieback |
| Publisher | : |
| Total Pages | : 60 |
| Release | : 1988 |
| Genre | : Motor vehicle scales |
| ISBN | : |
| Author | : Olga I. Selezneva |
| Publisher | : |
| Total Pages | : |
| Release | : 2017 |
| Genre | : Quality assurance |
| ISBN | : |
The Arizona Department of Transportation (ADOT) plans to install new weigh‐in‐motion (WIM) stations with either piezo-polymer or piezo-quartz sensors. Recognizing some limitations of WIM sensor technologies, ADOT sponsored this study to ensure the accuracy of the future WIM data collection. The project tasks included (1) reviewing other highway agencies’ practices related to WIM data quality assurance through literature review and a survey; (2) developing a guidebook of clear recommendations for managing WIM installation, calibration, maintenance, and data quality assurance; and (3) developing a research report with recommendations on how to achieve successful implementation of a WIM program. Through reviewing available literature and surveying selected highway agencies, the project team determined that the piezo-quartz sensors perform much better than the piezo-polymer sensors due to their consistent reliability, reduced calibration requirements, and relative temperature insensitivity. With proper installation, piezo-quartz WIM sensors should provide accurate axle and truck weight measurements in Arizona. Findings also indicated that piezo-polymer sensors should perform well in Arizona for vehicle classification, traffic volume, and speed studies, but not for weight data collection. This is due to the temperature sensitivity of piezopolymer sensors and to the limitations of auto-calibration and temperature compensation technologies in environments where pavements undergo rapid day-to-night temperature changes and are subjected to high seasonal temperatures. Piezo-polymer sensor use with an auto-calibration feature for weight measurements should be evaluated on a case-by-case basis. Using findings from the literature review and the successful WIM practices survey, the research team developed a guidebook with recommendations and procedures for WIM site selection and qualification, installation, calibration, maintenance, data quality assurance, and personnel needed to support ADOT’s WIM program. These recommendations are specific to WIM systems that use piezo-quartz sensors and piezo-polymer sensors. The guidebook is included as Chapter 4 of this final report.
| Author | : Jeffrey J. Lew |
| Publisher | : |
| Total Pages | : 228 |
| Release | : 1988 |
| Genre | : Electronic weighing systems |
| ISBN | : |
| Author | : Jeffrey J. Lew |
| Publisher | : |
| Total Pages | : 228 |
| Release | : 1988 |
| Genre | : Motor vehicle scales |
| ISBN | : |
