Rule 121 - The Highway Code

Rule 121

From: general rules techniques and advice for all drivers and riders 103 to 158

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Brakes affected by water. If you have driven through deep water your brakes may be less effective. Test them at the first safe opportunity by pushing gently on the brake pedal to make sure that they work. If they are not fully effective, gently apply light pressure while driving slowly. This will help to dry them out.

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