Correct answer
Yes, except to avoid a possible accident.
The vertical prohibition sign R-310 shown in the image tells us that audible warning signals are prohibited, except when needed to avoid a possible accident. This sign is a reminder of the general prohibition on using the horn or any other sound warning, with the sole exception of situations where an imminent accident must be prevented. When we see this sign, we must be aware that any unnecessary use of the horn is prohibited.
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All options
Yes, except to avoid a possible accident.
No.
Yes, although its use is permitted in traffic jams.
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