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Colorado Class R Knowledge Practice Test
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Weather, Visibility & EmergenciesStandalone practice
Why can pavement be especially slippery when rain first begins after a long dry period?
Correct answer: Water mixes with oil and residue before continued rain washes much of it away.
Why
Early rain can create a slick surface, so smooth control and lower speed are important.
Verified against Colorado Driver Handbook · First rain after dry weather · p. 19
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