Question juridique clé
Whether the cantonal authorities had to examine a speed reduction as a possible noise-sanitation measure before granting easements under Art. 14 LSV.
Solution extraite
Yes. The authorities could not grant easements without first clarifying the effects and proportionality of a possible speed reduction along the main traffic axis.
Motifs extraits
Art. 108 SSV requires a traffic expert opinion for lower speed limits; the possibility of noise reduction by lower speeds could not be excluded, and easements under Art. 14 LSV are exceptional and must be granted restrictively.