Which of the following statements is true regarding PQIs in asphalt pavement?

The statement that PQIs (Pavement Quality Indicators) provide feedback for process control is true because PQIs are essential tools used during the asphalt paving process to monitor the quality of the pavement being laid. They help in assessing various aspects such as temperature, density, and consistency throughout the paving operation. This real-time feedback allows contractors and project managers to make immediate adjustments to the asphalt mix or application process to ensure optimal results.

Effective process control based on PQIs can lead to improved pavement performance and longevity. By keeping track of these indicators, teams can identify potential issues before they become significant problems, thereby ensuring that the finished pavement meets the necessary specifications and quality standards.

In contrast, while density measurement is crucial in concluding the quality of asphalt, it is not the sole purpose of PQIs. Safety inspections are primarily focused on the overall safety of the pavement and surrounding areas rather than the quality of the material itself. Lastly, the idea that PQIs are not relevant to asphalt quality overlooks their critical role in monitoring and ensuring that the paving process meets quality control norms.