Select all that apply: which actions are consistent with the markings at a low arch bridge?
A high vehicle should follow the left edge even when the arch is lower there.
A high vehicle should use the marked path through the highest part of the arch.✓Bonne réponse
A low vehicle must never cross the guidance markings under any circumstance.
A low vehicle may keep left, crossing the markings, where this enables it to pass oncoming vehicles safely.✓Bonne réponse
Explication
The guidance markings place high vehicles under the greatest available headroom, and a low vehicle may keep left across them where this enables it to pass oncoming vehicles safely. Sending a tall vehicle to the edge reduces clearance, while treating the guidance as an absolute barrier for every low vehicle ignores the stated safe-passing allowance.