If a vehicle's driver repeatedly waves an arm up and down with short, quick oscillations, what is the driver warning of?

Question

DentroTest · Accepted Answer

In accordance with the General Traffic Regulations, drivers may warn of their maneuvers by means of optical signals or, failing that, with the arm. When a driver puts the arm out on the left-hand side and moves it up and down with quick, short movements, the driver is indicating that the vehicle will slow down considerably or that the driver intends to immobilize or stop the vehicle. The other options are incorrect because reversing is indicated by extending the arm horizontally with the palm of the hand facing backward, and a right turn is indicated by bending the arm upward at a right angle.

If a vehicle's driver repeatedly waves an arm up and down with short, quick oscillations, what is the driver warning of?

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