Which aspect does NOT apply to densities for the DOT?

The evaluation of pavement roughness does not directly pertain to the measurements of densities that are typically used in the Department of Transportation (DOT) practices. Densities are primarily focused on measuring the compactness of asphalt materials to ensure that they meet required specifications for strength and performance.

Validated test methods are essential for tracking and measuring densities accurately, as they ensure that the techniques used are reliable and accepted within industry standards. Quality assurance standards refer to the guidelines and criteria set forth to maintain consistency and quality throughout the paving process, which would include density measurements to assure a durable surface. The use of nuclear gauges is specifically relevant to density measurement in asphalt as they provide a quick and effective means of assessing material density on site.

In contrast, the evaluation of pavement roughness is associated with the ride quality and surface smoothness of the finished pavement, which is a different aspect of pavement performance and is not focused on material density itself.