Roundabouts
Explained

How to approach, which lane to use, when to signal, and how to handle mini and spiral roundabouts.

Roundabouts worry a lot of learners, especially the big, busy ones you’ll meet around Hertfordshire. Once you know a few simple rules, they become much easier. Here’s how to handle them safely and confidently.

Approaching the roundabout

Look for the signs and road markings early, and decide which exit you need.
Use mirrors, signal, then position: get into the right lane in good time.
Slow down early so you have time to look and plan.

Who has priority

Give way to traffic coming from your right, unless signs, road markings or traffic lights tell you otherwise. Even if you don’t have to give way, look right before you join.

Watch for vehicles already on the roundabout, as not everyone signals correctly. And before you move off, check the car in front has actually gone.

Which lane, and when to signal

Turning left (first exit): signal left, approach in the left-hand lane, and keep signalling left as you leave.
Going straight ahead: approach in the left-hand lane, unless signs or road markings show a different lane for your exit. You don’t need to signal as you approach. Once you’ve passed the exit before yours, signal left to show you’re leaving.
Turning right or going full circle: signal right, approach in the right-hand lane, keep to the right, then signal left after you pass the exit before yours.

Always follow the lane markings and signs if they show something different.

Mini-roundabouts

Treat them like normal roundabouts: give way to the right, and drive around the painted circle, not over it. There’s less time and space to signal, so plan early. Avoid U-turns on them, and watch for others doing them.

Where there are two mini-roundabouts close together, treat each one separately.

Spiral roundabouts

Some larger roundabouts have spiral lane markings that guide you towards your exit as you go round. Pick the right lane on approach, then follow your lane’s markings. They’ll take you to your exit without needing to change lanes.

Look out for others

Cyclists and horse riders: give them plenty of room. They may stay in the left lane even when going right round the roundabout.
Long vehicles: lorries and vehicles towing may take up more than one lane. Hold back and give them space.
Pedestrians: watch for people crossing the roads on the way in and out.

Common mistakes

Stopping when it’s safe to go, or going when it isn’t safe.
Being in the wrong lane for your exit.
Not checking the left-hand mirror before leaving.
Signalling too early or too late on the way off.

Poor observation at junctions and not following road markings (including on mini-roundabouts) are among the most common reasons people fail their driving test, so we practise roundabouts on all kinds of roads, not just the quiet ones.

Sources: GOV.UK: The Highway Code, rules 184 to 190.