If you need to stop when other drivers may not expect it:

Quickly tap your brake pedal a few times.
Sound your horn to alert other drivers.
Use your emergency brake.
Look over your shoulder for traffic in your blind spot.
Explanation

Clearly showing other drivers and pedestrians what you plan to do is extremely important, and helps to avoid crashes caused by unexpected actions. If you need to stop when other drivers may not expect it, quickly tapping your brake pedal several times will activate your brake lights and give an early warning to drivers behind you that you are slowing down or stopping.

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