Correct answer
No, as a general rule it is prohibited.
No. Article 79 prohibits U-turns in tunnels, underpasses and sections affected by the Tunnel sign. Mere convenience or a wish to return does not authorise the manoeuvre. A U-turn means travelling in the opposite direction, not any turn or lane change. Officers’ orders and applicable express regulation must be obeyed; a sign is not presumed to provide authorisation.
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All options
No, as a general rule it is prohibited.
Yes, simply considering a return essential is enough.
Yes, in any tunnel if no other vehicle is approaching.
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