Standards For Highway Weigh In Motion Wim Systems
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Standards For Highway Weigh In Motion Wim Systems
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Author : Clarence Edgar Lee
language : en
Publisher:
Release Date : 1991
Standards For Highway Weigh In Motion Wim Systems written by Clarence Edgar Lee and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with categories.
Standard Specification For Highway Weigh In Motion Wim Systems With User Requirements And Test Methods
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Author :
language : en
Publisher:
Release Date :
Standard Specification For Highway Weigh In Motion Wim Systems With User Requirements And Test Methods written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on with categories.
Standard Specification For Highway Weigh In Motion Wim Systems With User Requirements And Test Method
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Author : American Society for Testing and Materials
language : en
Publisher:
Release Date : 1990
Standard Specification For Highway Weigh In Motion Wim Systems With User Requirements And Test Method written by American Society for Testing and Materials and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with Electronic weighing systems categories.
High Speed Weigh In Motion System Calibration Practices
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Author : A. T. Papagiannakis
language : en
Publisher: Transportation Research Board
Release Date : 2008
High Speed Weigh In Motion System Calibration Practices written by A. T. Papagiannakis and has been published by Transportation Research Board this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with Motor vehicle scales categories.
Ltbp Program S Literature Review On Weigh In Motion Systems
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Author : Imad Al-Qadi
language : en
Publisher:
Release Date : 2016
Ltbp Program S Literature Review On Weigh In Motion Systems written by Imad Al-Qadi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with Bridges categories.
Truck size and weight are regulated using Federal and State legislation and policies to ensure safety and preserve bridge and high infrastructure. Weigh-in-motion (WIM) systems can capture the weight and other defining characteristics of the vehicles actually using the Nation's highways, providing important loading-related data that is essential for evaluating the performance of transportation infrastructure. As part of the Federal Highway Administration's (FHWA) Long-Term Bridge Performance (LTBP) Program's Technical Assistance Contract, a literature review of the state of the practice was performed for WIM systems installed in pavements and on bridges. This literature review focused on the development of WIM systems, concepts for measuring axle loads, the applications of WIM sensors for pavements, and recent advancements in bridge WIM system. This review covers the types, installation, calibration, operations, accuracy, efficiency, effectiveness, and durability of WIM systems, in addition to current Federal and State truck load regulations. This review facilitates selection of the appropriate WIM technology systems for consideration and use to address LTBP Program needs. This literature review serves as a reference document for Pooled Fund Project Number TPF-5(283), The Influence of Vehicular Live Loads on Bridge Performance, which targets the impact of vehicle live loads on bridge component durability.
Icwim 5 Proceedings Of The International Conference On Heavy Vehicles
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Author : Bernard Jacob
language : en
Publisher: John Wiley & Sons
Release Date : 2013-03-04
Icwim 5 Proceedings Of The International Conference On Heavy Vehicles written by Bernard Jacob and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-03-04 with Technology & Engineering categories.
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.
Traffic Monitoring Guide
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Author : United States. Federal Highway Administration. Office of Highway Information Management
language : en
Publisher:
Release Date : 1992
Traffic Monitoring Guide written by United States. Federal Highway Administration. Office of Highway Information Management and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with Traffic congestion categories.
Calibration Of Weigh In Motion Systems
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Author : J. M. Zuieback
language : en
Publisher:
Release Date : 1988
Calibration Of Weigh In Motion Systems written by J. M. Zuieback and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with Motor vehicle scales categories.
High Speed Weigh In Motion Calibration Practices
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Author : A. T. Papagiannakis
language : en
Publisher:
Release Date : 2010
High Speed Weigh In Motion Calibration Practices written by A. T. Papagiannakis and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with Calibration categories.
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.
Wim Sensors Accuracy Guidelines For Equipment Selection And Calibration And Traffic Loading Data Applications
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Author : Muhammad Munum Masud
language : en
Publisher:
Release Date : 2022
Wim Sensors Accuracy Guidelines For Equipment Selection And Calibration And Traffic Loading Data Applications written by Muhammad Munum Masud and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022 with Electronic dissertations categories.
Weigh-in-Motion (WIM) technology is one of the primary tools used for pavement management. It can provide essential and accurate truck traffic information, including vehicle class and speed, vehicle count, gross vehicle weight (GVW), single axle (SA) and tandem axle (TA) weights, axle spacing, and the date and time of the event. The State Departments of Transportation (DOTs) gather WIM data for various applications, including highway planning, pavement and bridge design, commercial vehicle weight enforcement, asset management, and freight planning and logistics. Overloaded trucks pose severe challenges to road transport operations. Overloaded trucks can cause more damage to the pavement systems than trucks loaded within legal weight limits. Truck overloading can also lead to severe consequences if involved in a traffic accident. Law enforcement agencies divert potentially overloaded trucks to static scales and issue tickets based on the information collected at a WIM station. Because of the wide range of applications, the data obtained at WIM stations must be accurate, consistent, and reflect actual field conditions.This study addressed four critical concerns related to WIM equipment performance, calibration needs, traffic loading data quality, and applications. Precisely, the current research advanced the state of the practice knowledge about (a) potential factors impacting WIM system accuracy, (b) accuracy and consistency of traffic loading data and calibration needs of WIM stations, (c) revised/modified guidelines for WIM equipment calibration, and (d) estimation of commercial freight tonnage from Gross Vehicle Weight (GVW) data. The research objectives were accomplished by synthesizing and analyzing the WIM performance and traffic loading data available in the Long Term Pavement Performance (LTPP) traffic database and data available through other state DOTs. The WIM sites analyzed in this study are from 30 states within the United States and 3 Canadian provinces. Several factors can affect the WIM system accuracy (i.e., measurement error). The potential site-related factors include road geometry, pavement stiffness, surface distresses, roughness, and climate. Decision tree models were developed in this study to illustrate a potential for estimating the expected WIM measurement error range using information about the WIM site and sensor-related factors. The results show that the sensor array and sensor types are the most important predictors, followed by WIM controller functionality (speed points). The data analysis and results also show that the climate can be important for some sensor types. One can integrate this information with equipment installation and life cycle costs to determine the most reliable and economical WIM equipment while also considering accuracy requirements by WIM data users.One way to evaluate WIM measurement errors is by using the data collected immediately before and after equipment calibration. The limitation of this approach is that the data represent a snapshot in time and may not represent a long-term WIM site performance. Consequently, an alternative approach was needed to characterize temporal variations in WIM data consistency. This study presents a method to estimate WIM system accuracy based on axle load spectra attributes [Normalized Axle Load Spectra (NALS) shape factors]. This analysis's main objective is to determine WIM system errors based on axle loading without physically performing equipment calibration. Using NALS to estimate WIM system accuracy can save a significant amount of time and resources, usually spent on equipment calibrations yearly.Successful WIM equipment calibration can eliminate systematic weight, speed, and axle spacing errors. The suggested changes in current WIM calibration procedures related to truck type (loaded truck), number of truck runs, and truck speed (multiple speed points) can significantly reduce the time and resources needed for successful equipment calibration. Accurate freight tonnage estimates and trends are essential due to their implications on economic, infrastructure development, and transportation policy decision-making. This study presents a practical application of WIM data to estimate freight tonnage and classify commodity types. The payloads computed for Class 9 trucks from GVW data strongly correlated with the average freight tonnage obtained from a commercial data source, i.e., Transearch from the IHS market. The user can independently verify the freight estimates from surveys at locations close to WIM sites.