Abstarct: The main purpose of this study is to evaluate the effects of transverse and longitudinal cracking of asphalt pavements on load transfer efficiency (LTE) using data obtained from PFWD. It will also be investigated the longitudinal and transverse cracking with the same width by their load transfer efficiency (LTE). So, two pavements different in asphalt thickness, pavement pattern and life were chosen to collect data regarding the deflections and fallings of the 900 different spots of transverse and longitudinal cracks on these pavements using PFWD. After the field data was examined, a new formula was proposed for LTE calculation which is expected to be more accurate than previous formulas. A numerical model formed in Abacus software was used to investigate the LTE mechanism on transverse cracks with more precision, the results of which confirmed the validity of this model compared to field data results. baxsed on the results obtained from the numerical model and field tests, it was observed that LTE in transverse cracks of asphalt pavement was dependent on the crack’s width and asphalt’s thickness. Also, the data was analyzed by descxriptive statistical methods such as box plot, t-test, regression analysis and time history of PFWD. The results indicated that in both types of cracks, as the width of the cracks increased, the load transfer efficiency decreased. It was also found that in the cracks with the same width, the load transfer efficiency was different for both longitudinal and transverse cracks. It was also proved that the cracks, the longitudinal cracking of which was less than 5mm and the cracks the transverse tracking of which was larger than 5mm had more significant effects on dropping the load transfer efficiency in asphalt pavements. Later in this study, in order to choose a crack-repair method, LTE parameter will be used as a substitute for “width of crack” parameter, yielding different results comparing to the results found in conventional methods.