What do amber reflective studs indicate on a motorway?

Amber reflective studs on a motorway serve to delineate the area between the carriageway and the central reservation. They are vital for guiding drivers along the motorway, particularly during low visibility conditions, by indicating the boundaries of the road and alerting them to the presence of the central reservation. This feature is crucial for maintaining safety on high-speed roads, as it helps prevent vehicles from veering too close to the barrier separating opposing lanes of traffic. The use of amber studs provides an effective warning system for drivers to ensure they remain within safe limits while navigating the motorway.