What can excessive moisture trapped between pavement layers cause?

Excessive moisture trapped between pavement layers can lead to blisters and upheavals in the pavement due to the pressure buildup from the moisture. This scenario occurs when water infiltrates the layers and cannot escape. As temperatures fluctuate and the moisture heats up, it can expand and create blisters or raise the surface layer, compromising the integrity of the pavement structure. This damage can lead to increased maintenance needs, reduced lifespan of the pavement, and potential safety hazards for vehicles. Proper drainage and moisture management are thus crucial in pavement design and maintenance to prevent these issues from occurring.