You see a yellow diamond sign showing a car with wavy skid marks behind it. What does the sign warn you about?
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A.
Loose gravel that has been thrown onto the roadway
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B.
Construction crews using heavy equipment along the road
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C.
Conditions that can cause you to lose control of your car Correct
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D.
Sharp curves that require you to reduce your speed
The answer is "Conditions that can cause you to lose control of your car"
The slippery pavement sign flags road conditions that can cause you to lose control of your car, so slow down because stopping takes longer on wet pavement. Answer A, 'loose gravel,' is the trap: learners who read the wavy lines as scattered debris rather than as the skid path of a tire reach for a gravel sign, but the manual assigns this diamond to wet-road slipperiness.
The traps in the wrong answers
A. Loose gravel that has been thrown onto the roadway
The slippery pavement sign covers wet-road slipperiness, not loose material lying on the surface. This answer reads the wavy lines behind the car as scattered debris rather than the skid path of a slipping tire.
B. Construction crews using heavy equipment along the road
Construction and maintenance warnings use orange, not the yellow diamond that marks slipperiness. This answer treats every diamond-shaped warning as a work-zone alert, ignoring the color rule that reserves orange for construction.
D. Sharp curves that require you to reduce your speed
A curve warning uses an arrow-and-curve symbol, not the wavy skid marks that mark slipperiness. This answer guesses at the shape of the road from a symbol that actually describes how a tire behaves on wet pavement.
This question tests your knowledge of Warning Signs in Illinois. Source: Illinois Rules of the Road, "Warning Signs," p.70..
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