What is the result of continuing to back up when a combination vehicle is jackknifed?

When a combination vehicle is jackknifed, it indicates that the trailer has swung out and is at an angle to the towing vehicle, forming a V-shape. Continuing to back up in this situation exacerbates the loss of vehicle control. As the trailer moves further away from the truck, it becomes increasingly difficult to steer the combination vehicle effectively. Attempting to back up can lead to the trailer swinging wildly, causing the operator to lose steering and control altogether, which may result in dangerous situations or accidents.

Stopping or attempting to straighten out the vehicles rather than continuing to back up is crucial to regain control and prevent further complications. Therefore, the outcome of continuing to back up during a jackknife situation is indeed a loss of vehicle control, which leads to potential hazards on the road.