Key legal question
Whether the proven speeding amount was 39 km/h and thus a gross traffic violation under Art. 90 Ziff. 2 SVG.
Extracted holding
The video-based follow-measurement and expert report were sufficiently reliable to establish an average speed of 159 km/h; the 39 km/h excess was proven.
Extracted reasoning
Partial non-compliance with the UVEK guideline did not invalidate the measurement. The expert had considered the decreasing distance between vehicles, and the court was entitled to rely on the coherent expert assessment.