North Carolina DMV Practice Exam

When are roads likely to be especially slippery?

Just after it has begun to rain or drizzle After a heavy snowfall In the middle of a snowstorm After a long dry spell

Correct Answer:

Just after it has begun to rain or drizzle

Explanation:

The likelihood of roads being especially slippery just after it has begun to rain or drizzle is due to the mix of oil and moisture present on the road surface. During dry periods, oil and other substances from vehicles accumulate on the pavement. When it first starts to rain, this mixture can create a slick layer that reduces traction. This phenomenon is particularly pronounced within the first few moments of rain when the water lifts the oil to the surface before it is rinsed away. Therefore, newly wet roads pose a higher risk for accidents and require drivers to exercise increased caution. Understanding this helps drivers adjust their behavior accordingly, such as reducing speed and increasing following distance during wet conditions.

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