What colour reflective studs would you find at the side of the road nearest a central reservation?

The correct answer is amber. Reflective studs are used on roadways to convey important information to drivers about the layout and hazards of the road. The amber reflective studs are placed at the side of the road nearest to a central reservation, which indicates that there is a median strip or a barrier separating opposing lanes of traffic. This helps drivers maintain awareness of their position on the road and reinforces the need for caution near central reservations.

In contrast, other colors have specific meanings: red studs indicate the left edge of the road, white studs denote lanes and the middle of the road, and green studs signal the beginning of a slip road or an entrance/exit from the motorway. Understanding the purpose of different colored reflective studs enhances a driver's situational awareness and aids in navigation, particularly in complex driving environments.