Where:
In urban areas, typically where a one-way street is about to intersect with a road carrying traffic in both directions.
These signs are placed in advance of the intersection to alert drivers that the road they are approaching will have vehicles travelling toward them as well as away from them.

Purpose:
To warn drivers that the one-way street they are on will soon meet a crossroad with two-way traffic.
This is important for lane positioning, overtaking decisions, and safely navigating turns.
The sign ensures that drivers are aware of the upcoming change in traffic patterns and can take appropriate precautions.

Action:
Plan lane changes early based on your intended turn at the intersection.
If you are in the left-hand lane and plan to turn right at the first intersection, move to the right-hand lane well in advance.
If you are in the right-hand lane and plan to turn left at the first intersection, move to the left-hand lane in good time.
Reduce speed as you approach the crossroad to allow time to observe traffic in both directions.
Check for oncoming vehicles, pedestrians, cyclists, and other obstacles before turning.
Signal clearly your intentions to ensure other road users are aware of your planned movement.
Maintain a safe distance from vehicles ahead and be prepared to yield if necessary.
Drive defensively, as vehicles from the crossroad may not always obey traffic rules or give way correctly.