What is the meaning of the following traffic signs?

- Give right-of-way on a narrow road.
- Careful! One-way traffic ahead.
- Entrance to a single lane one-way road.
- The number of lanes on the road is decreasing.· Correct answer

Sign 621 or 622 indicates that the number of lanes on the road is decreasing. This is a warning for drivers to prepare for a merging of lanes and to yield in accordance with the traffic rules. The sign appears before a section where the road becomes narrower.
Converging arrow = lanes diminishing
Confusing a lane-reduction sign with a narrow-road sign
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