<p>The study aims to analyze the flexural behavior of a rigid pavement resting on an expansive subgrade. The response of the pavement model to the stresses induced by wheel load and the swelling pressure is evaluated using the Pasternak Foundation Model. This model comprises a long beam representing the concrete pavement, the Pasternak Shear layer to approximate the behavior of the granular subbase beneath the pavement, and Winkler Springs to simulate the expansive soil. The governing differential equations were formulated and generalized using the non-dimensional form and the solution was obtained employing the finite difference approach. A parametric analysis was conducted considering the practical range of parameters and the appropriate boundary conditions for two distinct worst-case scenarios viz. (a) the wheel load positioned at the center of the pavement while considering the swelling pressure at the edge and (b) the swelling pressure at the center while considering the wheel load at the edge of the pavement. The results obtained revealed that two parameters, namely the modulus of subgrade reaction of the expansive soil and the affected length of the beam due to swelling pressure, had the most significant impact on the response of the pavement system. These findings emphasize the importance of considering variations in these parameters for the design and evaluation of rigid pavements resting on expansive subgrades.</p>