Hình dạng
A yellow diamond warning sign with a black arrow that bends first one way and then the other, showing a reverse turn.
Khi nào bạn gặp
It appears before two sharp turns in opposite directions that follow closely together, common on winding rural and hillside roads.
Bạn phải làm gì
Slow down before the first turn and stay at a controlled speed through both bends, keeping to your lane.
Nguồn: Sổ tay Thiết bị Kiểm soát Giao thông Thống nhất (MUTCD), ấn bản 11 — FHWA.
