Your vehicle is stationary. When may you use its horn?

A: When another road user poses a danger

B: When the road is blocked by queuing traffic

C: When it's used only briefly

D: When signalling that you've just arrived

When your vehicle is stationary, only sound the horn if you think there’s a risk of danger from another road user. Don’t use it just to attract someone’s attention. This causes unnecessary noise and could be misleading.

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