What responsibility may the contractor assume under traditional QC/QA responsibilities?

• A. Finalizes project design parameters
• B. Oversees traffic control devices on the project
• C. Sometimes selects material sources (Aggregate Pit/Quarry, Asphalt Binder Supplier)
• D. Sets highway geometric design criteria

Answer: (C)

In traditional QC/QA responsibilities, controlling material quality and ensuring the right materials are available for the project is a central task. The contractor may select material sources—such as aggregate pits/quarries and asphalt binder suppliers—as long as those sources meet the project specifications and are approved by the agency. This allows the contractor to manage supply chain quality, obtain proper certifications, and coordinate testing to verify conformity with the specs. Design decisions like finalizing design parameters or highway geometry are determined by the engineer and the DOT, not by QC/QA activities. Traffic control devices fall under construction operations rather than the QA/QC focus on material quality. So choosing material sources aligns with the QA/QC role because it directly affects material quality and compliance with specs.