What is 'jackknifing' in relation to truck driving?

The phenomenon known as 'jackknifing' specifically refers to a situation where the trailer of a truck swings out and forms an angle with the cab. This typically happens when the trailer skids or loses traction, often during sudden braking or on slippery surfaces. When jackknifing occurs, the trailer can swing sideways and potentially collide with the cab, creating dangerous conditions.

Understanding this behavior is critical for truck drivers, as it emphasizes the importance of maintaining control, especially in adverse weather conditions or when making sharp turns. The ability to recognize the signs of potential jackknifing can help in taking preventive measures, thus avoiding loss of control of the vehicle.

Other options do not accurately describe jackknifing; sudden acceleration, loading methods, and maintenance do not capture the unique aspect of trailer-cab angle dynamics that are critical in understanding truck stability and handling.