Driving Science · Roadcraft series
How police drivers overtake: the three-stage system
Overtaking is the most dangerous thing most drivers ever do voluntarily. Get it wrong on a single carriageway and the impact happens at the combined speed of both vehicles. Roadcraft — the police driver's handbook — treats overtaking not as a burst of acceleration but as a structured, three-stage decision that you can abandon at any point. Here's the system, adapted for Irish roads.
Section 1
Why overtaking deserves more respect than it gets
Roadcraft opens its overtaking chapter with arithmetic most drivers never do.
When you overtake on a single carriageway, you deliberately put your car into the path of oncoming traffic. If something oncoming arrives before you're back on your side, the closing speed is your speed plus theirs — two vehicles doing 80 km/h meet at 160. That is why, as Roadcraft notes, many overtaking deaths are head-on collisions on rural roads — and rural roads are already the most dangerous roads per kilometre travelled for every type of road user. Ireland's road network is overwhelmingly rural single carriageway, which makes this chapter arguably the most Irish-relevant in the whole book.
Overtaking is your decision and you can reconsider at any point. If in doubt, hold back.After Roadcraft 2025, Chapter 12
That's the mindset shift: police drivers treat an overtake as a plan with exit ramps, not a commitment. Every stage below includes the option to abandon. The drivers who get into trouble are the ones who treat pulling out as a point of no return.
Section 2
Three questions before anything else
Roadcraft's gate for every overtake — and the first one filters out most of them.
Do I need to?
What does this overtake actually gain? Arriving one car-length earlier at the next red light is the usual honest answer. If the need isn't real, the risk isn't justified.
Is it safe in the circumstances?
Road layout, visibility, oncoming traffic, what's behind you, the road surface, the weather — right now, on this stretch, not in general.
Is my vehicle capable?
Will it give you the acceleration you need — loaded, uphill, legally within the limit? Overtaking a long vehicle demands far more capability than passing a cyclist.
The overlooked third question: "can I legally achieve the speed I need?" If completing the pass requires breaking the speed limit, the overtake fails the test before it starts.
Section 3
The three-stage overtake
When you catch up with a slower vehicle and can't pass immediately, Roadcraft breaks the manoeuvre into three distinct positions — each with its own job.
Stage 1 — the following position
You've caught up but can't pass yet, so drop back to a safe following distance (your two-second gap) and start working: is the road layout suitable? How fast is the vehicle ahead? What's oncoming, and could something unseen arrive at speed? What's happening behind — is anyone about to overtake you? Where is my return gap? Roadcraft calls this the most complex stage of the three, because this is where the whole overtake is actually decided. Scan far distance, middle distance, foreground and mirrors — repeatedly.
Stage 2 — the overtaking position
When an opportunity is developing, close some of the gap and position for the best possible view past the vehicle. Two warnings from the book: this position is closer than a normal following gap, so use it only in readiness to overtake — and never so close that you intimidate the driver ahead. Tailgating is counter-productive as well as dangerous: pressured drivers tend to speed up. If a hazard appears — oncoming car, junction — drop back to the following position and wait.
Stage 3 — the overtake itself
Move out to get a clear view and a clear path without accelerating yet. From there, confirm it's safe — and only then accelerate past, continuing to assess what's beyond the vehicle as you go. If new information says no, you can still drop back. One caution once you're committed to the offside: the vehicle behind may have moved into your old space, so plan your return gap before you need it — if in doubt, hold back.
Section 4
Reading the drivers around you
Half of Roadcraft's overtaking chapter isn't about your car at all — it's about predicting other people.
The vehicle in front: does the driver know you're there? Has their earlier behaviour suggested they might respond aggressively and speed up? Can they even see you — a long vehicle, a big load, a left-hand-drive lorry? If a driver seems obstructive, Roadcraft's advice is blunt: reconsider whether the overtake is worth doing at all.
The vehicles behind: before you change speed or position, know what's in your mirrors. Watch especially for motorcycles — and for what Roadcraft memorably calls the "lurker": the driver who closes up unseen behind the queue and then sweeps out to overtake the lot, right as you pull out yourself.
⚠️ The pull-out-for-a-look problem
If you edge out to check the road ahead, the driver behind may read it as your overtake beginning — and move into the space you just left. Decide before you move; don't drift out on speculation.
Section 5
The classic overtaking collisions
Roadcraft illustrates the recurring crash patterns — every one of them a failure of anticipation, not car control.
The junction pull-out
A driver waiting at a side road can see the slow vehicle you're overtaking — but not you, hidden behind it. They pull out into your path.
The sudden right-turner
The vehicle you're passing — or one ahead of it — turns right without warning across your overtake. Tractors turning into field gateways are the rural classic.
The half-look
A driver emerging from a junction looks only towards the traffic they expect — their right — and pulls out as you approach from the unexpected side.
The vanishing return gap
You follow a lorry out to overtake; the lorry slips neatly into a return gap that's too small for you — leaving you exposed, facing the oncoming car.
The common thread: make sure you have a full view of the road ahead of the vehicle you intend to overtake, and never delegate your safety decision to the vehicle in front. Which is also why Roadcraft insists you identify your own return gap — never follow another car through "its" gap. This is anticipation — the same skill that our hazard-perception training builds, and the number-one crash factor identified in the research behind our guide Careless or Clueless?
Section 6
The harder situations
Overtaking a line of traffic
More vehicles, more time on the wrong side of the road, more drivers whose behaviour you must predict. Identify a return gap large enough to still exist when you arrive — gaps shrink. Treat a multi-vehicle overtake as a series of individual overtakes: safety-check at every return gap, re-assess, and resist the temptation to keep building speed with each car you pass — you'll need to slow to the queue's pace when you pull back in.
Bends and crests
Overtaking on a bend is only ever justified when the view through the bend is genuinely open and clear — where the road's geometry lets you see the whole stretch you need. If you can't see your complete overtake from start to return gap, it isn't an overtaking opportunity; it's a gamble.
Multi-lane roads
The risk shifts from oncoming traffic to closing speed from behind and drivers changing lanes without signalling. Roadcraft's tell: watch the gap between a vehicle's wheels and its lane markings — a narrowing gap means the vehicle is drifting out, signal or no signal. Overtake on the nearside only when all lanes are queuing, and never on the hard shoulder.
Section 7
Cyclists, motorcyclists and horses
The overtakes you'll do most often — and the ones with the least margin for error.
A bicycle has a tiny tyre contact patch, limited braking, no crumple zone and — often — a rider with no mirrors. Roadcraft's rules for passing one: allow at least 1.5 metres (more at higher speed, and more again in a larger vehicle); overtake on the offside; judge the cyclist's speed carefully, because it's routinely underestimated; and never overtake then immediately turn left across their path. After traffic lights with a cycle box, expect the cyclist to weave as they pick up speed — give extra room.
Motorcyclists need generous clearance too: pass close at speed and your vehicle's displaced air can physically destabilise them. Horses get the gentlest treatment of all — the British Horse Society guidance Roadcraft cites is no more than 10 mph (about 15 km/h) and at least 2 metres of space, no horn, no revving, and be prepared to stop.
Section 8
The Irish rules that frame every overtake
📘 Rules of the Road — the legal frame
Never overtake where a continuous white line runs along your side of the centre of the road (you may only cross it for access, or to pass a parked vehicle or obstruction — not to overtake moving traffic). Never overtake approaching a bend, junction, brow of a hill, pedestrian crossing or where the road narrows. Dangerous overtaking is a penalty-point offence — see our penalty points guide.
And the examiner's view: on the driving test you're assessed on judgement — overtaking where it's safe and legal, making progress where appropriate, and holding back where it isn't. A hesitant non-overtake is rarely marked; a marginal overtake can fail you in one move. The Roadcraft master question serves the test as well as it serves the police driver: do I need to?
The verdict
Roadcraft's system turns overtaking from an impulse into a plan: three questions before anything, three stages with an exit at each, your own return gap always identified, and a full view of the road ahead of the vehicle you're passing — or no overtake at all.
The strongest overtaking skill isn't acceleration. It's the confidence to hold back — and mean it.
Sources
Where this comes from
Concepts summarised and adapted in our own words for Irish learner and refresher drivers; brief quotations credited.
- Roadcraft: The Police Driver's Handbook (2025 edition), Chapter 12 — Overtaking. The Police Foundation / TSO. The three-stage system, the overtaking position, the "lurker", collision scenarios and vulnerable-road-user guidance are drawn from this chapter.
- RSA Rules of the Road — Irish law and guidance on overtaking, continuous white lines and locations where overtaking is prohibited.
- British Horse Society guidance (as cited in Roadcraft) — passing horses at no more than 10 mph with at least 2 metres' clearance.
Learn this on real roads.
Overtaking judgement, following position and hazard anticipation — coached one-to-one on the roads where you drive, by RSA-approved instructors.