Questão jurídica principal
Whether the lower court's fact-finding and evidence assessment were arbitrary regarding speed-limit signs and radar position.
Decisão extraída
The challenge was not substantiated; the appellant merely opposed his version to the cantonal findings and failed to show arbitrariness.
Fundamentação extraída
Federal review is limited to manifestly incorrect findings; the appellant did not engage with the lower court's reasons and could not show the evidence assessment was untenable. The roadside signs remained legally relevant even if allegedly irregularly placed.