A heavy vehicle cannot be overtaken easily and safely because the carriageway is too narrow. A usable shoulder is available. Under article 86.3, may it move onto it to let following traffic pass?

Correct answer

Yes, in that case it may use the usable shoulder; the rule provides for slowing or moving aside to facilitate passage.

Yes. Under those conditions, heavy or large vehicles or those subject to a specific speed limit must slow down or move onto the shoulder as soon as possible if usable. It is incorrect to claim every use of the shoulder to facilitate passage is forbidden. It does not require using an unusable shoulder or permit routine shoulder travel for every vehicle.