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Tar bleeding up through pavement cracks on a hot afternoon creates what hazard?
- A.Tar improves traction in all cases
- B.Tar only stains tires
- C.Slick patches, especially dangerous in curves and braking zones, where tires can lose grip on the soft tar
- D.Bleeding tar means the road was just repaved safely
Correct answer
C. Slick patches, especially dangerous in curves and braking zones, where tires can lose grip on the soft tar
Why
On very hot days tar can rise to the surface and make shiny, slippery spots that behave like grease, particularly where the road is also wet from a sudden shower. Slowing for curves and braking zones on heat-softened pavement is the correct adjustment.
Manual topic: Hot Weather - Road Surface · From the General Knowledge practice bank (GK-323).