When should cargo be inspected during a trip?

Answer: C — After 3 hours of driving or 150 miles, whichever occurs first

Cargo inspection during a trip is crucial for ensuring safety and compliance with regulations. The correct answer emphasizes the importance of performing inspections after a reasonable distance or time of driving has elapsed, specifically after 3 hours or 150 miles. This practice helps to confirm that the cargo has remained secure and has not shifted during transit, which can occur due to acceleration, brakes, turns, and other road conditions. By inspecting cargo at this stage, drivers can address any issues related to load security early, preventing potential hazards that could arise from shifting cargo, such as reduced vehicle control or accidents. Regular checks align with best practices in safety management and legal requirements, thereby protecting both the driver and other road users. While pre-journey inspections are important for ensuring the vehicle's readiness, limiting inspections to just before starting the journey fails to account for changes that might happen during driving. Similarly, relying on periodic inspections after longer driving durations without immediate checks within the earlier phases may miss critical adjustments needed to maintain cargo security. Hence, performing checks after 3 hours or 150 miles serves as a balanced approach to ensuring safety throughout the trip.