CDL General Knowledge Practice Test

What effect does "bleeding tar" have on road conditions?

It makes roads smoother It causes roads to become very slippery It repairs cracks in the pavement It enhances grip for tires

Correct Answer:

It causes roads to become very slippery

Explanation:

"Bleeding tar" refers to a condition in which the asphalt binder in road surfaces becomes soft and seeps to the surface, typically due to high temperatures or excessive traffic load. When this occurs, the liquid nature of the tar creates a slippery surface, particularly when wet or during rain. This can pose significant dangers to vehicles, as the reduced traction can lead to loss of control and increased stopping distances. Drivers need to be especially cautious when they encounter such conditions, as the slippery surface can result in accidents if proper care is not taken. Other potential effects of bleeding tar, like enhanced grip for tires or repairing cracks, do not apply to the slippery characteristic.

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