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AMDifficulty 2/5

With heavy rain and a very wet road, which risk can increase compared with a dry road?

Correct answer

Crash risk from reduced grip and greater braking distance.

Crash risk can increase because grip can decrease and braking distance can increase. This does not mean that rain makes every brake stop working: a functioning system still needs tyre-road grip. Reduce speed, increase following distance and avoid abrupt manoeuvres. Standing water can also cause aquaplaning.

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  • Visibility, which always improves in heavy rain.

  • Crash risk from reduced grip and greater braking distance.

  • Grip, which always improves with more water.

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