Key legal question
Whether the driver violated the duty of caution under Art. 34(3) LCR and Art. 13(5) OCR when turning left after moving to the right first.
Extracted holding
Yes. He had to use all available means to observe traffic and, if necessary, stop; the findings showed he failed to notice the overtaking vehicle.
Extracted reasoning
A driver changing direction must observe oncoming and following traffic; a bus driver making a left turn after shifting right must especially check mirrors and blind spots. The cantonally found facts bound the Federal Court and showed insufficient attention.