Roads are most slippery right after it begins to rain because:

Question

Roads are particularly slippery when it first begins to rain. The water mixes with oil drippings on the road that have not yet washed away, creating a slippery and dangerous mixture.

Accepted Answer

The water mixes with oil and grease on the road.

Answer

The roads are naturally slippery.

Answer

The gravel gets washed to the middle of the lane.

Answer

Some tires are not designed for rain.