Question juridique clé
Whether speeding by 22 km/h in a 30 km/h zone constitutes a grave traffic offence under Art. 90 ch. 2 LCR
Solution extraite
No general lower threshold applies in 30 km/h zones; the usual local-speeding threshold remains, so the offence was only simple under Art. 90 ch. 1 LCR on these facts.
Motifs extraits
The danger structure of zone 30 roads does not fundamentally differ from ordinary urban traffic in a way that justifies a general reduction of the grave-offence threshold. The schema of thresholds remains necessary, and any grave qualification below 25 km/h over the limit depends on concrete special circumstances, which were absent here.