This report documents a study conducted to evaluate load transfer efficiency of cracks and joints for rigid pavements included in the Long-Term Pavement Performance (LTPP) program. Using deflection testing data, load transfer efficiency parameters were determined and joint stiffnesses were backcalculated. Trend analysis was performed to evaluate the effect of design features and side conditions on load transfer efficiency. The analysis was conducted for all General Pavement Studies (GPS), Special Pavement Studies (SPS), and Seasonal Monitoring Program (SMP) test sections.

This report will be of interest to highway agency engineers involved in the deflection data collection, processing, and analysis of data collected to improve on the design procedures, as well as future researchers who will improve structural models of rigid pavements.