Roads become very slippery:
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Just before it starts raining.
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When it stops raining.
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When it has been raining for a long time.
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When it first starts to rain.
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Explanation
Road surfaces are especially slippery during the first few minutes of rainfall. Water mixes with oil, rubber particles, dust, and other debris, creating a dangerous, slick film that reduces tire traction. This makes it harder to maintain control on curves and increases stopping distances. During this early phase of rain, it's crucial to slow down, drive cautiously, and adjust to the reduced grip on the road.
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