Motorway reflective studs

Question 1

What colour are the reflective studs between a motorway and slip road?

Answer 1

Green

Question 2

What colour are the reflective studs between the lanes of the motorway?

Answer 2

White

Question 3

What colour are the reflective studs along the left hand edge of the motorway?

Answer 3

Red

Question 4

What colour are the reflective studs on the right hand edge of the motorway?

Answer 4

Amber