TRB's National Cooperative Highway Research Program (NCHRP) Report 683: Protocols for Collecting and Using Traffic Data in Bridge Design explores a set of protocols and methodologies for using available recent truck traffic data to develop and calibrate vehicular loads for superstructure design, fatigue design, deck design, and design for overload permits.
The protocols are geared to address the collection, processing, and use of national weigh-in-motion (WIM) data. The report also gives practical examples of implementing these protocols with recent national WIM data drawn from states/sites around the country with different traffic exposures, load spectra, and truck configurations. The material in this report will be of immediate interest to bridge engineers.
This report replaces NCHRP Web-Only Document 135: Protocols for Collecting and Using Traffic Data in Bridge Design.
Appendices A through F for NCHRP Report 683 are available only online. These appendices are titled as follows.
â€¢ Appendix Aâ€"Survey Questionnaires & Responses
â€¢ Appendix Bâ€"Main Features of Selected Studies
â€¢ Appendix Câ€"National WIM Data Analyses
â€¢ Appendix Dâ€"Potential Processes to Develop and Calibrate Vehicular Design Loads
â€¢ Appendix Eâ€"Implementation of WIM Error Filtering Algorithm
â€¢ Appendix Fâ€"Truck Sorting Strategies & Influence on "r" Values
Table of Contents
|Scope of Study||5-6|
|Overview of Data Collection and Review||8-8|
|Proposed Process to Develop Vehicular Live-Load Models||21-25|
|Background to Development of Draft Recommended Protocols||26-29|
|Draft Recommended Protocols for Using Traffic Data in Bridge Design||30-58|
|Demonstration of Recommended Protocols Using National WIM Data||59-87|
|Additional Studies on Truck Sorting Strategies - NCHRP 12-76 (01)||88-102|
|Findings and Recommendations||103-105|
|Draft Recommended Protocols for Using Traffic Data in Bridge Design||107-109|
|Demonstration of Protocols Using National WIM Data||110-110|
|Suggested Research and Improvements in Data Collection||111-112|
|Bibliography and References||113-115|