The Priority Road sign, which is triangular with a white background and a red border, indicates that you are on a road where vehicles have the right of way over those entering from the side.

When you see this sign, it means that if there are intersecting roads, vehicles on the intersecting roads must yield to you. This ensures smoother traffic flow and enhances safety at intersections. It's important to always remain vigilant and be prepared to stop for vehicles or pedestrians even when you have the right of way, especially in busy areas.

If you have any further questions about this sign or other traffic rules, feel free to ask!