Where:
At intersections where a one-way road joins another road.
May also appear at the start of one-way streets or at junctions where traffic is permitted to flow in only one direction.

Purpose:
To inform drivers that the road ahead or turning from the intersection is a one-way carriageway.
It indicates the direction of permitted traffic, left, right, or straight ahead, ensuring that vehicles travel safely and in the correct direction.

Action:
Proceed only in the direction indicated by the arrow if you intend to enter that one-way road.
Do not attempt to travel in the opposite direction, as this could lead to collisions with oncoming traffic.
Be alert for other vehicles entering the one-way road from different directions.
Signal your intended turn in advance to inform other road users.
If you do not wish to enter the one-way carriageway, choose an alternative route that allows travel in your desired direction.