605-11
Traffic device 605-11: Chevron marker board

Explanation
The chevron board closes off an area; the arrowhead shows on which side you must pass (here on the left).
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Lesson L24 · Supplementary signs, markings & traffic devicesTraffic devices↗Similar signs to tell apart
Traffic device 600-30: Barrier
Traffic device 605-10: Marker board (right side)
Traffic device 610: Traffic cone
Traffic device 615: Mobile barrier board
Traffic device 620-40: Delineator post (right)
Traffic device 625-10: Bend chevron board
Traffic device 630: Parking warning boardTest yourself on these signs
A one-minute drill: pick the right meaning for each sign.
Legal basis: § 43 StVO