Expansive clayey soils pose significant challenges to pavement performance due to their high swelling and shrinkage characteristics. This often leads to pavement distress, particularly in low-volume traffic areas. Geotextiles, known for their ability to filter, reinforce, and drain, offer a promising solution to mitigate these issues. This study investigates the impact of geotextiles on pavement drainage in expansive clayey soils. A laboratory setup was created to compare the drainage performance of pavements with and without geotextiles. Moisture sensors and Arduino Uno were employed to measure drainage efficiency. The readings of the test samples were monitored continuously at a constant interval to check the drainage effect of the sample with and without a geotextile. The results demonstrate that geotextiles can effectively improve drainage capabilities, ultimately enhancing pavement longevity and performance in regions prone to expansive soils.