The Subtle Art of Roundabouts — Or: I Picked the Wrong Day to Stop Sniffing Glue
- Anthony Tiernan
- Jun 5
- 10 min read
Roundabouts are, in theory, one of the most elegant solutions in road design. No traffic lights. No waiting for a green that may or may not come. Just a circle, a simple rule, and the collective goodwill of everyone involved.
And yet.
In practice, roundabouts are where collective goodwill goes to die — slowly, in a series of confused brake-taps and vague hand gestures that mean nothing and help no one. Somehow, a circle with one rule has become the thing most likely to make a grown adult question their life choices.
The good news is there are rules. Clear, learnable rules that have existed for decades. The slightly more interesting news is that there are also other rules — the unwritten ones operating in real time between four drivers who all believe they have right of way, none of whom are indicating, and at least one of whom has been in the roundabout so long they've started to accept it as their permanent address.
We'll get to those. First, the official version. Pay attention — this part is on the test.
The Golden Rule — Singular. One. That's All They Gave Us.
Give way to any vehicle already in the roundabout or entering from your right.
That's it. One principle. They built the entire system around it. And still — still — people arrive at roundabouts as though the rules are a suggestion, a starting point for negotiation, a vibe.
Vehicles on your right have priority. Whether they're already circulating or entering just ahead of you, they go first. Not the car sitting opposite you having an existential crisis about which lane to use. Not the bloke who got there two seconds before you and is therefore, in his mind, morally entitled. Your right. Something coming from that direction — you wait. You're in the roundabout — you go.
It is not complicated. It is a circle. We've had circles since ancient times.
The Art of Indicating — A Love Language Nobody Speaks
Indicating at roundabouts is, for a significant portion of the driving population, entirely optional. A creative choice. A mood. For the rest of us who'd like to know what you're actually doing, here's how it works.
Turning left: Approach in the left lane unless markings tell you otherwise. Indicate left on approach, keep indicating through the turn, cancel when you're out. You're the easy one. Everyone likes you.
Going straight ahead: No indicator needed on approach — use either lane unless arrows restrict you. Indicate left as you exit, if it's practical. On a tiny single-lane roundabout where you're through in three seconds, "practical" is doing a lot of heavy lifting in that sentence. Do your best.
Turning right or doing a U-turn: Approach in the right lane unless markings say otherwise. Indicate right on approach. Keep indicating right as you travel around the island. Then — and this is the part people treat like a surprise plot twist — switch to left when you're ready to exit. This isn't specific to right turns. It applies every time you leave the roundabout. The left indicator on exit is you communicating to other drivers that you are, in fact, leaving. That you have not chosen to simply live there. That the roundabout is a thoroughfare and not a destination. Do it every time it's practical. Which is almost always.
Changing Lanes Inside a Roundabout
Yes, you can. No, you probably shouldn't need to, because the correct lane was available to you before you entered and planning ahead is a thing humans are capable of.
But if you must — broken line only, you cannot cross an unbroken white line, same as everywhere else on earth. Indicate. Check your blind spots. Give way to anyone already in the lane you want. Everything you'd do on a normal road, just while navigating a circle, tracking your exit, and wondering if that Camry is going straight or turning right because God knows its driver isn't going to tell you.
Exiting — The Step Everyone Forgets Exists
Every exit requires a left indicator. Not just right turns. Every time you leave the roundabout, if it's practical, you indicate left. It tells the driver waiting at that entry that you're leaving — which means they can go. It is, among other things, an act of basic human decency.
Pedestrians and Cyclists — The Part Nobody Reads Until It Matters
Pedestrians: No legal obligation to give way unless there's a marked crossing. That said — and I probably shouldn't have to say this — don't hit them. Defensive driving still applies. People on foot are not yield signs.
Cyclists: Here is the rule that breaks people's brains every single time. In a multi-lane roundabout, a cyclist is legally allowed to use the left lane to turn right. They then give way to vehicles exiting as they leave. This is not a typo. This is not a trick question. This is in the actual road rules, has been there for years, and the overwhelming majority of drivers have no idea it exists.
That cyclist in the left lane who appears to be going the wrong way and making terrible decisions? They're not. They know exactly what they're doing. They're waiting for you to exit before they continue. You're the one who didn't know the rule. Bit awkward.
The Mythology — Things People Believe With Complete Confidence That Are Wrong
Before we get to the unwritten rules, we need to address the mythology. Because roundabouts have accumulated a body of folk wisdom over the decades that is confidently held, widely shared, and frequently incorrect.
"You always give way to the right." Half right. You give way to vehicles on your right and vehicles already in the roundabout — which are often the same thing, but not always. The rule is about who's already in the circle, not a blanket right-of-way for anything approaching from your right regardless of where they are. The driver who's been told "always give way to the right" and applies that literally will eventually sit frozen at a roundabout entry waiting for a car that's already past them and exiting. This happens more than you'd think.
"Small roundabouts have different rules." They don't. There is one set of roundabout rules in NSW. They apply equally to the tiny painted circle outside a primary school and the six-lane monster at a major arterial intersection. The rules don't scale with the diameter. Same rules. Every time. The size changes the execution, not the law.
"You don't have to indicate on a roundabout." This one has been passed down through generations like bad advice at a family dinner. You absolutely must indicate when turning left or right. Going straight ahead, you don't need to indicate on entry — but you still need to indicate left when you exit. "I didn't know" is not a defence. "My dad told me" is definitely not a defence.
"If I'm already moving I don't have to give way." Yes you do. Being in motion does not grant right of way. A surprising number of people believe that having already committed to entering a roundabout — the car is moving, the decision is made, the wheels are turning — somehow supersedes the give way obligation. It does not. The give way rule applies right up until you are fully inside the roundabout. Commitment is not priority.
Multi-Lane Roundabouts — Where the Rules Get Layers and the Chaos Compounds
Single-lane roundabouts are one thing. Multi-lane roundabouts are where everything above gets multiplied, compressed, and tested simultaneously at 50 kilometres an hour.
The Northern Beaches has some exceptional specimens. The Warringah Road roundabout at Frenchs Forest. The intersection at Forest Way and Mona Vale Road. Anyone who's navigated Wakehurst Parkway at school pickup time knows that a multi-lane roundabout under volume is a completely different exercise than the theory suggests.
In a multi-lane roundabout, lane discipline before you enter is everything. The arrows on the road are not decorative. They tell you which lane to use for which exit, and ignoring them creates exactly the kind of mid-roundabout lane dispute that ends with two drivers glaring at each other in adjacent driveways five seconds later.
The right lane is for turning right or doing a U-turn. The left lane is for turning left or going straight ahead. If both lanes show straight ahead arrows, you can use either — but you must exit in the lane you entered from unless there are arrows directing otherwise. This is the rule people violate constantly, usually because they got into the wrong lane on approach and decided to fix it inside the roundabout, which is the worst possible time and place to fix it.
The golden rule still applies. But now you're also tracking vehicles in the lane next to you, watching for people changing lanes without indicating, and trying to remember which exit is yours while everything is moving at once. This is not complicated. It just requires that you pay attention, which is apparently a big ask.
The Learner Driver Experience — Both Sides of the Car
I've sat in the passenger seat through several thousand roundabout approaches. I've seen the full spectrum.
There is the student who arrives at their first roundabout, stops completely, checks right, checks right again, checks right a third time with the energy of someone defusing a bomb, and then — when the road is clear in every direction including directions a roundabout doesn't even have — edges forward at three kilometres an hour with the expression of someone who has made peace with whatever comes next.
There is the student who approaches with total confidence, doesn't check right, pulls straight out in front of a moving vehicle, and then looks at me like I did something wrong.
And there is, eventually — usually around lesson six or seven — the student who just gets it. Who reads the roundabout on approach, identifies the gap, times the entry, and moves through cleanly without narrating it to themselves or white-knuckling the wheel. It happens in a specific moment and you can see it on their face when it does. The roundabout stopped being a problem and became a manoeuvre. That's the whole job, really.
From the learner's side, the roundabout is genuinely intimidating for a specific reason that nobody ever names: it's the first place on the road where you have to make a judgment call under time pressure with real consequences and no one to defer to. Traffic lights tell you when to go. A give way sign at a T-intersection is manageable — one direction to check, one decision to make. A roundabout asks you to assess multiple vehicles moving at different speeds from multiple directions and pick a gap, and it asks you to do this while also managing your speed, your lane position, your steering, and your indicators, and while someone is sitting next to you watching all of it.
That's not a knowledge problem. That's a confidence problem. And confidence only comes one way — repeated exposure until the roundabout stops feeling like a threat assessment and starts feeling like a gap to drive into.
The Other Rules
And now we get to the part the RMS doesn't publish, because you cannot legislate human behaviour, and if you could, roundabouts are proof that nobody would comply anyway.
The unwritten rules of roundabouts operate on a currency of eye contact, incremental vehicle creep, and the shared understanding that someone has to commit first and it might as well be the person with the most confidence — or the least awareness that hesitation is an option.
There is the confident entry — the driver who has assessed the gap, decided it's sufficient, and moves without ceremony or apology. They are usually right. They are occasionally terrifying. Either way, they're through the roundabout while you're still thinking about it.
There is the mutual hesitation — two cars at opposite entries, both slowing, both waiting for the other to go, both creeping forward in an elaborate performance of courtesy that helps no one and manufactures the exact gridlock the roundabout was engineered to prevent. Somebody go. Please. Today.
There is the phantom indicator — the driver whose left blinker has been on since they left Penrith and carries no meaningful information by the time it reaches you. You're just supposed to intuit their intentions from context clues and vibes.
There is the late indicator — slightly different from the phantom, and in some ways worse. This driver indicates left as they are already leaving the roundabout. The information arrives simultaneously with the event it was meant to predict. Technically compliant. Completely useless. The driving equivalent of saying "heads up" while throwing the ball at someone's head.
There is the creeper — who, rather than making a decision, simply advances one centimetre at a time over the course of approximately thirty seconds, hoping that the universe will eventually arrange itself into a configuration that feels safe enough to proceed. The universe is not going to do that. There will always be another car. You have to go.
And then there is the wrong-lane merchant — who has committed to the left lane for what is clearly a right turn, realised this somewhere between the approach and the entry, decided the solution is to simply cut across anyway, and is now everybody's problem. They are not malicious. They are not reckless. They just didn't plan ahead and they're not going to let that stop them. There is one at every busy roundabout. You know them on sight.
And there is the rarest, most satisfying manoeuvre in suburban driving: the perfectly timed entry. You read the flow, identify the gap, and move through a busy roundabout without touching the brake. No drama, no hesitation, no eye contact negotiations with strangers. Just geometry, timing, and judgment working together in a brief moment of automotive grace.
That's the subtle art. Not the rules — the rules are easy, they fit in a paragraph, a reasonably intelligent person can learn them in an afternoon. It's the other stuff. Reading four vehicles simultaneously. Anticipating what people think they're about to do versus what they'll actually do. Making a clean decision in the half-second gap between someone's bumper and your front end.
Nobody teaches you that part. You just have to drive enough roundabouts until suddenly, one day, you stop thinking about it.
The glue was never the problem. The roundabout was fine all along.
It was everyone else.
Anthony Tiernan is the founder of Safe2Start Driving School, serving the Northern Beaches from Manly to Palm Beach.
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