TRB’s National Cooperative Highway Research Program (NCHRP) Report 575: Legal Truck Loads and AASHTO Legal Loads for Posting explores recommended revisions to the legal loads for posting as depicted in the Manual for Condition Evaluation of Bridges, and the Guide Manual for Condition Evaluation and Load and Resistance Factor Rating (LRFR) of Highway Bridges. The report examines the development of the new loads.
Appendix A: Survey Questionnaires and Responses Appendix B: WIM Data Analyses Appendix C: Analyses of Generic Spans for Formula B Trucks Appendix D: Analyses of Generic Spans for Non-Formula B Trucks Appendix E: Estimating Maximum Loading by Simulation Appendix F: Recommended Revisions to AASHTO Manuals Appendix G: NCHRP Project12-63 Calibration Report WIM Data (Warning: This is a large database that may take a few minutes to download.)