Can traffic officers make visual and audible signals?
Signage: Traffic officers
Explanation
Traffic **officers** have the ability to make both **visual signals** and **audible signals** to direct and control traffic.
- **Visual signals**: Officers can use **arm signals** to indicate to drivers that they must stop or slow down. These signals are visible from a distance of 150 meters, ensuring that drivers can see them well in advance. Additionally, officers can use lights to direct traffic, as shown in the image below:
- **Audible signals**: Officers can also use **whistles** to give audible indications. These audible signals are useful for capturing the attention of drivers in situations where visual signals may not be sufficient.
Therefore, traffic officers combine both types of signals to ensure effective traffic control, confirming that the correct answer is that they can indeed make both visual and audible signals.
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