- At a glance
- Group
- Prohibitory signs · 32 of 46
- Shape
- Circle (B-20: octagon)
- Colours
- White background, red border, black symbol; zone signs on a white panel
- Legal basis
- § 24 of the regulation on road signs and signals
- Exam questions
- None in the question catalogue
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B-30 End of no audible warning signals
What it means
Cancels the horn ban set by sign B-29.
