<p>The present study evaluated the load–deflection linearity of pavements incorporating emulsion treated base layers using field deflection data. Seven pavement test sections constructed with different base layer compositions, including conventional granular base and emulsion treated base layers with varying emulsion content and reclaimed asphalt pavement incorporation, were investigated. Surface deflections were measured using a falling weight deflectometer under five impact load levels ranging from 30 kN to 70 kN. Deflection bowl parameters were used to estimate the contributions of the base, subbase and subgrade. Linear regression analysis showed strong linear relationships between load and deflection parameters, with coefficients of determination greater than 0.90 for all sections. Layer elastic moduli were estimated using back calculation and were observed to remain approximately constant within the investigated load range, with standard deviations less than 10% of the mean values. The results indicated that the pavement layers behaved elastically under the applied loading conditions. Deflections measured in sections with emulsion treated base layers were lower than those in the conventional base section, indicating improved stiffness. The findings confirm that linear normalization of deflection data can be reliably applied for structural evaluation within the load range of 30 kN to 70 kN.</p>