Drivers of trucks and truck tractors with cargo must check that the cargo is well-secured within the first ___ miles of a trip.

For drivers of trucks and truck tractors, it is crucial to ensure that cargo is well-secured to maintain safety during transport. The requirement to check the security of cargo within the first 50 miles of a trip is based on the acknowledgment that cargo can shift due to factors such as acceleration, deceleration, and road vibrations.

During the initial part of a journey, especially under changing conditions like starts and stops, the cargo can become unsecure even if it was loaded correctly. A check after 50 miles allows the driver to identify any potential issues before they can affect road safety or cargo integrity.

This practice not only helps prevent accidents but also complies with safety regulations designed to protect both the driver and other road users. Regular checks throughout the journey may also be necessary, but the initial assessment at this distance is particularly vital to ensure safety right from the beginning of the trip.