Visual inspection of asphalt pavements is primarily used to assess what aspect?

Visual inspection of asphalt pavements serves as a fundamental method for evaluating multiple characteristics that influence the performance and longevity of the pavement. First, assessing color uniformity helps in identifying potential issues like oxidation or weathering that can affect the material's durability and appearance. This is important because inconsistent coloration may signal underlying problems with the asphalt or its application.

Surface roughness is another critical aspect evaluated through visual inspection. An uneven surface can lead to increased wear on vehicles, reduced ride quality, and even safety hazards due to potential skidding or hydroplaning issues. By checking for smoothness or irregularities in the surface, inspectors can gain insight into the wear and tear the pavement has experienced over time.

Lastly, overall structural integrity encompasses the pavement's ability to withstand traffic loads and environmental factors. Even though a visual inspection may not detect issues deep beneath the surface, it can reveal surface distress signs such as cracking, raveling, or deformation, all of which hint at potential structural problems.

Thus, because visual inspection encompasses these various aspects—color uniformity, surface roughness, and overall structural integrity—it is accurate to state that it primarily assesses all of these factors.