Correct answer
Yes, unless expressly prohibited, while observing the lane conditions.
Contraflow lanes opened for traffic flow are reserved for motorcycles and passenger cars without trailers; a lorry may not use them. Opening a lane for roadworks is a separate case: vehicles authorised to use the road under works may enter unless expressly prohibited. Article 41 conditions then apply: at least dipped headlights by day and night, between 60 and 80 km/h or lower established or signed limits, and no entry into normal-direction lanes, even to overtake.
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Yes, always, even if a sign expressly prohibits it.
No, lorries are prohibited even when the lane is opened for roadworks.
Yes, unless expressly prohibited, while observing the lane conditions.
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