What does a long whistle sound made by a traffic officer mean?
Signage: Traffic officers
Explanation
**Acoustic signals** made by a **traffic officer** are important for directing the flow of vehicles. A **long whistle blow** indicates the **obligation to resume driving** and continue moving. This means that upon hearing this signal, drivers must start driving again.
On the other hand, it is important to remember that traffic officers' signals must always be followed, as they are essential for maintaining order and safety on the road.
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