Roundabouts are a fundamental part of the road network in England. According to the Department for Transport, they are widely used because they reduce collision severity, improve traffic flow, and limit delays compared with traffic-light junctions. However, despite their benefits, roundabouts remain one of the most misunderstood junction types—particularly when it comes to reading roundabout signs correctly.
This updated guide explains how to read and use roundabout signs in England, using the latest official guidance, so you can approach any roundabout with confidence, accuracy, and control.
What Is a Roundabout Sign?
A roundabout sign is a directional diagram sign placed before or at the entrance to a roundabout. Its purpose is to help drivers choose the correct lane before entering, which is a key requirement under UK driving rules.
A standard roundabout sign shows:
• A circular diagram representing the roundabout
- • Exits in clockwise order (UK roundabouts are driven clockwise)
- • Destinations and road numbers for each exit
- • Lane information, where applicable
The gap at the bottom of the circle represents your approach road.
Under Rule 186 of The Highway Code, drivers are expected to read signs and road markings before reaching the give-way line, not while on the roundabout.
Understanding Colours on Roundabout Signs
The background colour of a roundabout sign tells you the type of road you are on or joining:
- • Green background → Primary routes (major A-roads)
- • White background → Local or non-primary roads
- • Blue background → Motorways
- • Brown background → Tourist destinations
Where a route changes type, the sign may show coloured panels within the diagram, indicating the classification of each exit.
UK traffic sign regulations define this colour system and are consistent nationwide.
How to Use a Roundabout Sign: Step by Step
1. Identify Your Exit Early
As you approach the roundabout, read the sign and locate:
• Your destination name
• The exit number (counting only real exits, not stubs)
2. Understand Lane Information
Some roundabout signs show lane layout, either by:
- Thicker lines (multiple lanes)
- Marked arrows
- Spiral guidance
Where lane information is shown, it overrides general rules and must be followed (Highway Code Rule 186).
What Are “Stub” Roads on Roundabout Signs?
Stub roads are short, thin lines shown on some roundabout diagrams. They represent:
- Roads joining the roundabout from the opposite direction
- Roads that are not exits you can take.
Important:
- Do not count stub roads as exits
- They exist to warn you of additional traffic joining the roundabout
This feature is specifically mentioned in UK driver training guidance and test standards.
Lane Choice: What the Highway Code Actually Says
There is no legal “12 o’clock rule” in UK law.
Instead, the Highway Code states:
- Use the left lane for:
- Turning left
- Going straight ahead (unless signs say otherwise)
- Use the right lane for:
- Turning right
- Full-circle / later exits
However:
- Signs and road markings always take priority
- Some roundabouts require specific lanes even for a straight ahead
(Source: Highway Code Rules 184–186)
Entering and Exiting the Roundabout Safely
When entering:
- Give way to traffic from the right
- Do not cross lanes unnecessarily
- Maintain your lane position
When exiting:
- Signal left after passing the exit before yours
- Watch carefully for:
- Cyclists
- Motorcyclists
- Pedestrians at crossings
Cyclists may remain in the left lane for any exit, which is explicitly permitted under current guidance.
Special Types of Roundabouts You Should Recognise
Mini-Roundabouts
- Painted central circle
- You must drive around the centre
- Give way to the right
Spiral Roundabouts
- Lanes guide you out automatically
- Follow road markings, not assumptions
- Lane changing mid-roundabout is expected and planned
Standard / Conventional Roundabout
A standard roundabout:
- Has a central island (usually raised)
- Does not use spiral lane guidance
- It is larger than a mini-roundabout
Requires drivers to:
- Give way to traffic from the right
- Choose the correct lane before entry
- Maintain lane discipline throughout
Conclusion
Roundabout signs in England are carefully designed to give drivers all the information they need before entering the junction. By understanding the layout, colours, exit numbering, lane guidance, and the meaning of stub roads, you can make calm, correct decisions every time.
Correct use of roundabout signs leads to:
- Safer driving
- Smoother traffic flow
- Fewer last-second lane changes
- Better driving test results
Mastering this skill is not just about passing a test—it is about driving confidently for life.