The officer moves their arm up and down alternately. What does this signal require from drivers of vehicles approaching from the front?
Signage: Traffic officers
Explanation
Arm of the officer moving up and down: reduce speed
- Meaning: the movement of the arm **up and down** indicates that you must **reduce your speed**.
- Who is affected: the users approaching from the **side of the moving arm**, including those arriving **head-on** if the gesture is directed towards them.
- How to act: clearly reduce your speed and be prepared for possible additional orders or a **potential stop**.
- Safety: if you cannot **stop safely**, avoid sudden braking; moderate your speed as much as possible in a **safe** manner.
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