Where should the front trailer supports be before driving away after coupling with a semitrailer?

The front trailer supports should be fully raised with the crank handle secured before driving away after coupling with a semitrailer. This is crucial for safe operation as fully raising the supports eliminates any risk of dragging them on the ground, which can cause instability or damage to the supports and the trailer. When the crank handle is secured, it ensures that the supports remain in the raised position, preventing accidental lowering during transit.

Having the front trailer supports in any other position, such as half height, lowered to the ground, or partially raised, poses significant safety risks. These configurations can lead to improper weight distribution, potential trailer instability, and the risk of roadside incidents. Therefore, securing the supports in the fully raised position contributes to a safe and efficient operation when driving with a semitrailer.