What colour are the reflective studs that identify the left-hand edge of the motorway?

Explanation: Red reflective studs line the left-hand edge of a motorway carriageway. You'll see white studs between lanes, amber studs on the right edge of the carriageway, and green studs between the carriageway and its slip roads. These studs can be used to help you determine your position in poor visibility.

Category: Vehicle handling (2021)

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