Question juridique clé
Whether the unlawfully placed 60 km/h sign could be enforced against the driver.
Solution extraite
No; a prohibition sign binds only if it is clear, visible, and placed in accordance with the rules, which was not the case here.
Motifs extraits
The sign was positioned on the left side at an impermissible distance and could not be seen in oncoming traffic, so no punishable disregard of that sign was possible.