What does a traffic officer indicate by emitting a long and continuous whistle blow?

Question

DentroTest · Accepted Answer

In the priority order of traffic signals, orders from officers take precedence over any other rule or sign. Regarding the use of the whistle, there are two clear acoustic signals: a series of short and frequent blows requires you to stop. Conversely, a long and continuous blow indicates that you must resume the march (start moving). This signal is commonly used to restore traffic flow after a stop.

What does a traffic officer indicate by emitting a long and continuous whistle blow?

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