4.8.1. The sign to diagram 615 (S3‑2‑9, see Figure 4-27) indicates that drivers must give priority to vehicles from the opposite direction on a narrow length of road. It should be used only when vehicles at each end of the priority section are clearly visible to each other and speeds are not high. The sign must not be displayed to traffic approaching from both directions. Schedule 3 General Direction 3 requires that the circular sign must always be used with its associated supplementary plate; legends are specified at S3‑3‑5, 9 and 10. The circular sign must never be used upside down without the plate in an attempt to imply reversed priority. The plate legend “Give way to oncoming vehicles”, with or without a distance, should be used at the start of the priority section.