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Why is a road often most slippery during the first minutes of rain?
- A.Rain washes all oil away instantly
- B.Oil and grime on the pavement mix with water before being washed off
- C.Tires become softer in the rain
- D.Paint lines become rougher
Correct answer
B. Oil and grime on the pavement mix with water before being washed off
Why
Oil and dirt that have built up on the road mix with the first rain and create a slick film. Traction usually improves after the rain has had time to wash the surface clean.
Manual topic: California Motorcycle Handbook (DL 655) - Hazardous Surfaces · From the California Motorcycle Permit practice bank (CAM-046).