Signage
Intersections to which priority to the right applies are usually not equipped with signage or road markings. Priority signs override the priority to the right rule and are often used on roads with heavier traffic. However, if an intersection is not easily visible, a warning sign (usually a white or yellow triangle with red border and a cross symbol) may be erected. This sign does not regulate priority but just warns of an intersection. White, yellow and black diamond signs on the main road show that users have priority over entering traffic.
Under the priority to right system, priority is always given to traffic entering the right, unless priority signage overrules this.
In Switzerland, road markings may also be used to indicate that the junction is a priority to right junction.
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intersection ahead (This is not a priority sign but a warning sign. However, it is only used at intersections where priority to the right applies.)
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priority at next intersection (The warning shows the side roads may have a bad view of the priority road)
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priority road (priority at all following intersections up to an end of priority road, yield or stop sign). In some countries, the meaning was changed to the one next crossroad only.
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end of priority road (priority to the right applies at uncontrolled intersections)
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Additional sign of a shape of the intersection and a definition of the priority
Read more about this topic: Priority To The Right