Illinois CDL Practice Exam.

Checking your load before starting, during, and at the end of each trip is essential for several reasons. Prior to departure, it's important to ensure that the load is secured properly to prevent any shifting during transit, which could lead to loss of control or accidents. Regular checks during the journey help identify any potential issues, such as load movement or deterioration of securing mechanisms, which can occur due to changes in speed, road conditions, or braking. Finally, checking the load at the end of the trip allows for an assessment of any changes that might have occurred during transportation and ensures that everything is in order before unloading. This comprehensive approach contributes to safety, stability, and compliance with regulations regarding load security. The other options do not emphasize the continuous nature of load checking throughout the entire trip, which is critical for maintaining safety on the road.