What situation can lead to jackknifing of a tractor and trailer?

Jackknifing typically occurs when the tractor and trailer form a sharp angle between them, usually a situation where the angle is 90 degrees or less. This condition can cause the trailer to swing out from behind the tractor, leading to a loss of control. When the trailer begins to turn outwards, it can create a pivot point at the hitch, making it challenging to regain control of the vehicle combination.

Driving on a flat tire and exceeding speed limits can contribute to an overall lack of vehicle control and increase the risk of accidents; however, they do not specifically lead to the characteristic dynamics that result in jackknifing. Additionally, driving on a wet surface also increases the chances of losing traction but does not directly result in the angular relationship between the tractor and trailer that leads to jackknifing. Understanding how these dynamics work is essential for maintaining control of a commercial vehicle and preventing dangerous situations on the road.