With what instrument do traffic officers make acoustic signals?
Signage: Traffic officers
Explanation
Traffic **officers** use different means to give instructions to drivers. Among these means are **audible signals with a whistle**.
- The whistle is an essential tool for officers, as it allows them to emit acoustic signals that are easily recognizable by drivers.
- There are two main types of whistle signals:
- **Several short and repeated blasts** indicate that the driver must **stop the vehicle**.
- **One long blast** signals that the driver can **resume driving and continue**.
Therefore, the **whistle** is the instrument that traffic officers use to make acoustic signals, ensuring that their instructions are clear and effective in maintaining order and safety on the roads.
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