Question juridique clé
Whether the canton court arbitrarily assessed the evidence and violated in dubio pro reo by relying on the police vehicle speed reading without applying the technical instruction's additional 10% margin.
Solution extraite
The cantonal court's assessment was not arbitrary; the technical instructions are non-binding recommendations, and the remaining evidence supported a speed of at least 170 km/h.
Motifs extraits
The Federal Court held that in dubio pro reo adds nothing beyond the prohibition of arbitrariness in evidence assessment. The instructions on speed checks do not bind the judge. The appellant's own admission of 180 km/h and the 15% deduction still left sufficient margin, and no substantiated arbitrariness in the facts was shown.