What is the CTI's role regarding the producer's responsibilities during transit?

• A. Confirm the producer's quality plan is being followed and communicate issues.
• B. Verify mix design compliance, monitor conditions during transport, and communicate issues to the producer.
• C. Approve all adjustments to batch proportions without input.
• D. Monitor only delivery temperature.

Answer: (B)

During transit, the CTI ensures the concrete remains faithful to the approved mix design and that transport conditions keep it within specifications. This means verifying batch proportions and materials match the design, watching factors like temperature, time in transit, and potential segregation or slump changes, and then communicating any deviations to the producer so corrective actions can be taken before placement. This approach covers both design compliance and real-time condition monitoring, not just a single aspect. Some options focus only on delivery temperature or grant unquestioned authority to adjust batch proportions without producer input, which isn’t how a CTI operates.