Final answer:
Tread separation is a defect found in vehicle tires where the layers of the tread detach, affecting the crown/tread and shoulder areas, which can lead to hazardous driving conditions.
Step-by-step explanation:
The tread separation condition in tires refers to a serious fault where the layers of the tire tread become detached from one another. This issue primarily affects the crown/tread area and the shoulder area of a tire. Tread separation can be caused by a defect during tire manufacturing, improper tire maintenance, or underinflation. When this occurs, it compromises the integrity of the tire and can lead to a loss of vehicle control, which is extremely dangerous, especially at high speeds.