Reflective Studs on Motorway
Reflective studs (often called "cat's eyes") are small raised road studs that light up in your headlights. They help you see lane markings and the edges of the carriageway, especially at night or in poor weather. Understanding reflective studs on motorways is essential for passing the DVSA driving theory test and for staying safe on UK motorways and dual carriageways.
Use this Reflective Studs on Motorway guide to learn the key rules for learner drivers, see how they apply in everyday driving, and help you prepare for the UK
car theory test,
motorcycle theory test,
HGV / LGV theory test,
PCV theory test, or
ADI Part 1 DVSA theory test.
Everything you need to get test-ready quickly and pass your DVSA theory test first time
Driving Theory 4 All's AI-powered theory test practice app and online Learning Zone give you everything
you need to pass. Get the most up-to-date DVSA practice theory test questions, hazard perception test clips,
unlimited mock theory tests, Highway Code content, UK road and traffic signs, and smart AI tools that help
you revise faster and remember more.
Trusted and highly rated 4.7 out of 5 by UK learner and professional drivers
Get Driving Theory 4 All's AI theory test practice course now
What are reflective studs on motorways?
Reflective studs are small, coloured, reflective markers fixed into the road surface. They help drivers and riders:
- See the lane markings in the dark or in poor visibility.
- Identify the left-hand and right-hand edges of the carriageway.
- Recognise slip roads, lay-bys and junctions on motorways and dual carriageways.
- Spot temporary lane changes and road works.
On your theory test, you'll be expected to know what the different colours of reflective studs mean and how to use them to stay in the correct lane and position on the road.
Key reflective stud rules on motorways
As a learner driver or rider, you need to understand what each colour of reflective stud means and how to use them on motorways and dual carriageways. Here are the key reflective stud rules you should know:
-
Use reflective studs to help you keep to the correct lane, especially at night or in poor visibility.
-
White studs are used to mark the lanes or the centre of the road between lanes of traffic travelling in the same direction.
-
Red studs mark the left-hand edge of the carriageway β use these to avoid drifting onto the hard shoulder or verge.
-
Amber studs mark the central reservation (right-hand edge) of a motorway or dual carriageway β they help you avoid getting too close to oncoming or opposing traffic.
-
Green studs mark slip roads, lay-bys and some side roads joining or leaving the main carriageway.
-
Green/yellow studs are used at road works or temporary lane layouts to show changed lane boundaries β follow them carefully along with any road works signs and lane arrows.
-
Remember that reflective studs are a guide only β you must still choose a safe speed, keep a safe following distance and follow all road signs and markings.
These reflective stud rules are based on Rule 132 of the UK Highway Code, which explains the different colours and where they are used on motorways and dual carriageways. Want to see the Highway Code reflective stud rules?
View the Highway Code reflective stud rules.
DVSA theory test booking - still to book or already have a UK theory test date booked?
Whether you still need to book your DVSA theory test or you've already got a UK theory test booking date in the diary and want to pass first time, choose the option below that best matches where you are and we'll help you move one step closer to passing first time.
-
-
-
-
-
-
-
MOST POPULAR
Car Theory Test Prep
Best for getting test-ready on a budget.
Β£5.99
|
|
365-day web and app access |
|
|
Complete DVSA practice question bank |
|
|
100+ hazard perception clips |
|
|
Unlimited mock tests |
Car Theory Test Prep +
Pass Protection*
Best for a safety net: your money back if you do not pass.*
Β£9.99
Everything in Theory Test Prep, plus:
BEST VALUE
Car Theory Test Prep +
Unlimited Re-sits*
Best for avoiding re-sit costs: your next tests are free if you fail.*
Β£19.99
Everything in Theory Test Prep, plus:
Car Theory Test Prep,
Unlimited Re-sits* &
Theory Test Booking
Best for having it all handled: we book your DVSA test, you revise.
Β£49.00
Everything in Unlimited Re-sits, plus:
|
|
We book your DVSA theory test for you |
|
|
The Β£23 DVSA test fee included |
|
|
Web and app access until your test |
MOST POPULAR
Motorcycle Theory Test Prep
Best for getting test-ready on a budget.
Β£5.99
|
|
365-day web and app access |
|
|
Complete DVSA practice question bank |
|
|
100+ hazard perception clips |
|
|
Unlimited mock tests |
Motorcycle Theory Test Prep +
Pass Protection*
Best for a safety net: your money back if you do not pass.*
Β£9.99
Everything in Theory Test Prep, plus:
BEST VALUE
Motorcycle Theory Test Prep +
Unlimited Re-sits*
Best for avoiding re-sit costs: your next tests are free if you fail.*
Β£19.99
Everything in Theory Test Prep, plus:
Motorcycle Theory Test Prep,
Unlimited Re-sits* &
Theory Test Booking
Best for having it all handled: we book your DVSA test, you revise.
Β£49.00
Everything in Unlimited Re-sits, plus:
|
|
We book your DVSA theory test for you |
|
|
The Β£23 DVSA test fee included |
|
|
Web and app access until your test |
MOST POPULAR
LGV Theory Test Prep
Best for getting test-ready on a budget.
Β£14.99
|
|
60-day web and app access |
|
|
Complete DVSA practice question bank |
|
|
100+ hazard perception clips |
|
|
Unlimited mock tests |
LGV Theory Test Prep +
Pass Protection*
Best for a safety net: your money back if you do not pass.*
Β£19.99
Everything in Theory Test Prep, plus:
MOST POPULAR
PCV Theory Test Prep
Best for getting test-ready on a budget.
Β£14.99
|
|
60-day web and app access |
|
|
Complete DVSA practice question bank |
|
|
100+ hazard perception clips |
|
|
Unlimited mock tests |
PCV Theory Test Prep +
Pass Protection*
Best for a safety net: your money back if you do not pass.*
Β£19.99
Everything in Theory Test Prep, plus:
MOST POPULAR
ADI Theory Test Prep
Best for getting test-ready on a budget.
Β£14.99
|
|
60-day web and app access |
|
|
Complete DVSA practice question bank |
|
|
100+ hazard perception clips |
|
|
Unlimited mock tests |
ADI Theory Test Prep +
Pass Protection*
Best for a safety net: your money back if you do not pass.*
Β£19.99
Everything in Theory Test Prep, plus:
MOST POPULAR
LGV CPC Theory Test Prep
Best for getting test-ready on a budget.
Β£14.99
|
|
60-day access |
|
|
Learning material and practice tests covering every DVSA topic |
|
|
Over 60 practice case studies |
MOST POPULAR
PCV CPC Theory Test Prep
Best for getting test-ready on a budget.
Β£14.99
|
|
60-day access |
|
|
Learning material and practice tests covering every DVSA topic |
|
|
Over 60 practice case studies |
Reflective studs on motorways in real driving situations
Reflective studs are not just facts needed to help you pass the UK driving theory test - they're vital for everyday motorway and dual carriageway driving. You'll use them every time you:
-
Drive at night or in poor visibility and need help to stay in the correct lane.
-
Use red and amber studs to stay safely between the left edge of the carriageway and the central reservation.
-
Look for green studs to find slip roads, service areas, lay-bys or places where traffic joins or leaves the motorway.
-
Follow green/yellow studs through road works where lanes have been temporarily moved or narrowed.
In your practical driving test, examiners will expect you to use reflective studs sensibly to maintain good lane discipline, especially when driving at higher speeds or in reduced visibility.
Reflective stud theory test questions in the DVSA theory test
Reflective studs appear in the multiple-choice part of the DVSA theory test in several ways. You may be asked:
- Which colour studs mark the left-hand edge of a motorway or dual carriageway.
- Which colour studs are found between lanes or at the central reservation.
- Which studs you'll see at slip roads, lay-bys or service areas.
- What green/yellow studs indicate at road works or temporary lane layouts.
Explore a sample of the latest DVSA theory test revision questions in Driving Theory 4 All's
theory test questions and answers
section.
Source: Department for Transport (GOV.UK) - The Highway Code. Contains public sector information licensed under the Open Government Licence v3.0.