You are on a motorway in fog. The left-hand edge of the motorway can be identified by reflective studs. What colour are they?

Explanation: Be especially careful if you're on a motorway in fog. Reflective studs are used to help you in poor visibility. Different colours are used so that you'll know which lane you are in. These are
- red on the left-hand side of the road,
- white between lanes,
- amber on the right-hand edge of the carriageway,
- green between the carriageway and slip roads.

Category: Vehicle Handling

References: The Official DVSA Guide to Driving: Section 11, Highway Code: Rule 132