What colour are the reflective studs where a slip road joins a motorway?

Explanation: The reflective studs between the carriageway and the hard shoulder are normally red. These change to green where there's a slip road. They help you identify slip roads when visibility is poor or when it's dark.

Category: Band 2 traffic signs and signals

References: The Official DVSA Guide to Driving: Section 11, Highway Code: Rule 132, Know Your Traffic Signs: Page 71