What acoustic signal does a traffic officer make with a whistle to order drivers to resume driving?

Question

DentroTest · Accepted Answer

In the hierarchy of signaling, orders from traffic officers take priority over any other sign. Regarding the use of a whistle, General Traffic Regulations establish a clear distinction: a series of short and frequent blasts orders vehicles to stop. Conversely, a single long blast orders drivers to resume driving. It is vital to know this difference to avoid stopping when the officer is indicating to clear the road or proceed.

What acoustic signal does a traffic officer make with a whistle to order drivers to resume driving?

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