Glossary of Terms

The first publication in this series; the ‘Glossary of Terms’ with definitions of terms commonly used in the ISWIM best practices publication series. This document is designed to capture the different practices used around the world including some differences in definitions and terms that represent the rich spectrum of WIM practitioners.

Download: Glossary of Terms

This glossary is a living document, published electronically by ISWIM and updated regularly; any comments or proposed changes to the definitions should be sent by email to: info@ is-wim.net. This document does not circumvent any available standard WIM specifications, international standards or calibration procedure terminology.

WIM Data for Bridge Engineering

The second publication in this series; the use of ‘WIM Data for Bridge Engineering’, What should I know, What should I do? This guide is developed by ISWIM volunteers to assist bridge engineers and inspectors interested in using truck weight and size data collecting by WIM systems. It describes what is considered a good practice in the use of weigh-in-motion (WIM) data for bridge-related applications and assumes no prior knowledge of WIM. The guide focuses on the use of WIM data rather than on the data collection process itself.

Download: WIM Data for Bridge Engineering

There are many ways in which WIM data can be exploited in the bridge community to protect structures, to assess the loading on structures or to estimate the health of structures. Therefore, the guide provides guidance on use of WIM data for:

  1. Bridge design and assessment loading;
  2. Bridge overload protection and;
  3. Bridge health monitoring
  4. WIM data quality management is another important aspect covered in this guide.

This document does not circumvent any available standard WIM specifications. Any comments or questions for this guide could be provided by email to: info@is-wim.net.

Calibration of WIM Systems

The third publication in this series; Calibration of WIM Systems for In-Road and Bridge-WIM. This guide, developed by a group of ISWIM volunteers, may serve as a valuable resource for contractors, transportation agency personnel, and road owners
involved in the calibration of WIM equipment. It offers recommendations based on proven best practices from the WIM industry and published documentation, aiming to assist in the successful calibration of in-road and bridge WIM systems.

The purpose of this document is to provide step-by-step procedures for the calibration of high-speed WIM equipment. It may also be used to serve as basis for the establishment of specific requirements and procedures for successful WIM operation.

Download: Calibration of WIM Systems

It is important to emphasize that this guide does not intend to serve as standard or dictate what actions individuals or organizations should take. Rather, it provides an overview of the best practices in the calibration In-Road highway and Bridge WIM Systems used in the international WIM industry. This document was designed to be informative, and users can decide if they would like to utilize its recommendations. Calibration processes can vary depending on the specific applications, operational conditions, and financial/organizational constraints. Any comments or questions for this guide could be provided by emailinfo@is-wim.net.

Note: This guide is specifically designed for systems used in general traffic monitoring, statistical applications, and pre-selection for roadside weight enforcement controls. Definitions of WIM terms used in this document can be found in the “ISWIM Glossary of Terms” published on the ISWIM website, available for download at https://www.is-wim.net/iswim-glossary-of-terms/.Please be aware that this guide is not intended for systems used in legal metrology applications, such as direct enforcement.