Red reflective studs are placed on which side of the carriageway?

Red reflective studs are used to indicate the edge of the carriageway on the left side, next to the hard shoulder. They help drivers navigate on the road, especially in low visibility conditions, by signaling the boundaries of the roadway. When a driver sees red studs, it alerts them that they are approaching the edge of the road and should be cautious, particularly if they are veering off or approaching a potential hazard.

The placement of these studs is significant for safety, as it guides drivers in avoiding accidents, particularly at night or in adverse weather. Meanwhile, other positions, such as the central reservation, the right side of the carriageway, or the middle of the road, are marked with different colored studs to convey other information about the road layout and to ensure that drivers are well-informed about their surroundings.