What can result in jackknifing?

Jackknifing occurs when a trailer swings out to the side of the towing vehicle, leading to what can be a highly dangerous situation. Poor braking techniques are a primary cause of jackknifing. When the driver does not apply the brakes evenly or suddenly slams on the brakes, it can cause the trailer to lose traction, especially if the trailer wheels have a different grip on the road surface compared to the towing vehicle. This loss of traction can initiate the trailer swinging sideways, which is the definition of jackknifing.

Braking techniques are crucial for maintaining control of both the vehicle and the trailer, particularly in adverse conditions. Effective braking involves gradual application of brakes and maintaining a safe distance from other vehicles, allowing for ample stopping time and space. When this is not executed properly, the risk of a jackknife situation increases significantly, showcasing the importance of proficient braking skills in safe heavy trailer operation.