Where would you expect to see red coloured reflective studs or cats-eyes?

You would expect to see red coloured reflective studs or cat's eyes on the left edge of the road.

Here's why:

* Road markings: In most countries, road markings are designed for drivers on the right side of the road. Red reflective studs are placed on the left edge of the road to:

* Guide drivers: They help drivers stay in their lane, especially in low-light or nighttime conditions.

* Warn of road hazards: They can indicate the start of a narrowed road, a bridge, or other potential dangers.

Important Note: This applies to countries where people drive on the right side of the road. In countries where people drive on the left, the red reflective studs would be on the right edge of the road.