Bends & Cornering

The System of Car Control — known as IPSGA — gives you a structured way to approach every bend safely. By working through Information, Position, Speed, Gear, and Acceleration in the correct order, you’re always in control before the corner. It’s a flowing framework drawn from Roadcraft: The Police Driver’s Handbook — and the key word is flowing, not sequential.

Most of us drive bends by feel. We approach, ease off a little, turn the wheel, and quietly hope. That works, right up until a bend tightens without warning. What follows is a walkthrough of what the System of Car Control actually teaches. Treat this not as a five-point list to memorise, but as a discipline you can start applying from the next bend you take.

In this article, you’ll learn:

• How each IPSGA phase connects directly and practically to cornering
• Why the limit point is the most useful real-time tool you’re probably not using
• What “overlapping” means, why it happens, and how to stop doing it

Ready? Let’s begin!

What Is the System of Car Control (IPSGA)?

IPSGA is a set of overlapping phases that flow into one another, each setting up the next. The system comes from Roadcraft: The Police Driver’s Handbook — the accepted UK standard for advanced driving and the foundation on which IAM RoadSmart and similar training programmes are built.

Pro Tip: The distinction most explanations miss is this: Information isn’t phase one, but continuous. It underpins every other phase throughout the manoeuvre. You’re not gathering information and moving on; you’re gathering it all the way through, right up to the point you accelerate clear.

Information: Read the Road Before the Bend Reads You

Information in the IPSGA sense is active, not passive. It isn’t about spotting a bend warning sign and noting that a bend exists. It means reading the road surface, watching the camber, tracking your limit point, observing oncoming traffic, and continuously updating your mental picture as your position and speed change.

The distinction that matters is between static observation (seeing a hazard) and dynamic observation (understanding how that hazard is developing as you approach it).

• Watch for tyre marks, standing water, or debris; they reveal the character of a bend before you’re committed to it.
• Note the camber: an adverse camber (the road sloping away from you) reduces grip through the corner; a favourable one improves it.
• Keep reading even past the apex — hidden junctions and late exits don’t announce themselves.

Position: Where You Sit on the Road Changes What You Can See

Correct road positioning before a bend directly determines how much of the corner you can see before you’re in it. More visibility means more time to make decisions, which means the ability to enter at a higher safe speed. The two are inseparable.

Every positioning decision should satisfy three conditions: Safety, View, and Stability — always in that order.

• Right-hand bend: Move to the nearside — the left side of your lane. This widens the arc of your sightline around the bend, pushing your limit point farther away and giving you earlier information about what lies ahead.
• Left-hand bend: Drift toward the offside — the right side of your lane. The same logic applies in mirror image; you’re lengthening your view around the curve.
• Always stay within your own lane — this is about widening your vision within the space you legally occupy, not cutting across it.

Better position equals wider view equals more time to respond equals a safer entry speed.

Speed: Your Speed Must Match Your Sight

The governing principle of the Speed phase is this: I should only ever be travelling at a speed that allows me to stop safely within the distance I can see to be clear. That’s the whole idea. Everything else — the speed limit, what the car in front is doing — is secondary to that.

Brake on the straights, steer on the bends. This mantra earns its keep because braking needs to be completed before steering input begins. By the time IPSGA reaches the Gear and Acceleration phases, the speed work should already be done.

Gear: The Right Gear Does the Heavy Lifting

Gear selection going into a corner is an essential control decision. The right gear gives you smooth, progressive acceleration on exit, and it allows the engine to support your deceleration on approach without the car relying entirely on the footbrake.

Match the gear to the speed, not the speed to the gear. The gear you select should allow smooth acceleration through and out of the bend without needing a change mid-corner. A gear change mid-bend briefly disrupts the car’s balance, which is exactly when you need it most.

Acceleration: Not a Reward for Surviving the Bend

Acceleration sense is the ability to modulate speed so smoothly that braking is rarely needed. Applied to cornering, it means feeding power in progressively from the apex onwards, not jabbing the throttle once the road looks clear.

When I begin accelerating smoothly from the apex, weight shifts rearward. That loads the rear tyres, increases grip, and settles the car through the remainder of the bend. A progressive input does all of that quietly and effectively. A jab at the throttle does none of it — and often does the opposite.

The Limit Point is Your Real-Time Speed Gauge

The limit point is the furthest point ahead where the road is clearly visible — where your sight line ends and the road disappears around the bend. What makes it genuinely useful is that it moves, and the direction it moves tells you exactly what the bend is doing at any given moment.

It behaves in three distinct ways, each one a direct instruction:

• Limit point coming toward you: The bend is tightening, or your speed is too high for the available visibility — ease off and reassess
• Limit point holding at a constant distance: You’re matching the rate at which the road is revealing itself — your speed may be appropriate, but assess it rather than assume
• Limit point moving away from you: The bend is opening up and more road is becoming visible — it’s generally safe to feed in smooth, progressive acceleration

Think of the road as gradually revealing itself. Your speed at any moment should allow you to stop comfortably before that furthest visible point.

How to Avoid Overlapping

We’ve all done it. The bend looked gentle on approach. It wasn’t. You enter slightly too fast, realise too late, and reach for the brake pedal while you’re already turning.

This is what we call overlapping, and it’s where the System of Car Control breaks down most dramatically.

Overlapping means braking while cornering, usually while also in the wrong gear. The physics explain precisely why it goes wrong so quickly:

When you brake mid-corner, weight transfers forward. The front tyres get loaded; the rear tyres lose grip. Add a steering input — which places a lateral force across the car — and your tyres are now managing braking force, cornering force, and potentially engine braking simultaneously. Grip is a finite resource, and this will overdraw it.

The result is understeer (the front can’t follow the steering input), oversteer (the rear steps out), or both at once. Neither is recoverable without skill and a healthy measure of luck. The fix is the mantra: Speed-Gear-Steer. Get your velocity sorted, select your gear, then steer — not before, not during.

Putting It All Together Step by Step

Here’s how IPSGA plays out in sequence on a real bend. Once you’ve internalised this rhythm, it should play out almost automatically every time you approach a corner:

1. Spot the bend early — identify its type, camber, and limit point from as far out as possible; begin the Information phase immediately
2. Adjust your road position — nearside for a right-hander, offside for a left-hander; do this before the bend begins
3. Assess and set your speed — use the limit point as your live reference; complete your braking on the straight so your entry speed is fixed before you steer
4. Select your gear — match it to your entry speed; choose a gear that allows smooth acceleration out without a mid-corner change
5. Steer — and only steer — no braking, no gear changes; the car should be balanced and settled at this point
6. Feed in acceleration from the apex — progressively, as the road opens ahead; let the weight shift rearward and stabilise the car
7. Resume normal position and speed once you’re fully clear of the bend

The IPSGA Countdown

Most descriptions of IPSGA present it as a sequence. What makes it actually work on the road is treating it as a timing system — a set of trigger points, each one cued by what you can see ahead of you.

Try internalising the approach this way instead:

• “By the time I can read the bend clearly, my position should already be sorted.”
• “By the time I reach the braking zone, my speed reduction should be completing — not starting.”
• “By the time I’m at the apex, my foot should already be moving toward the accelerator.”

This reframing from a sequential checklist to anticipatory timing is how you tell you’ve gone from knowing the System to internalising it. You stop reacting to bends and start reading them instead.

Common Cornering Mistakes (And What’s Actually Going Wrong)

Even experienced drivers carry bad cornering habits. The mistakes below rarely come from carelessness; rather, they usually trace back to a specific IPSGA phase being applied too late, or skipped under pressure.

Understanding the cause is far more useful than just knowing what to call it:

• Entering too fast — almost always because the limit point wasn’t assessed early enough; the bend surprises you, and overlapping follows automatically.
• Braking mid-corner — the textbook overlapping scenario; weight shifts forward, rear grip drops, and the car becomes unpredictable in both directions.
• Wrong gear on entry — too high a gear leaves you with poor acceleration response and limited engine control; too low causes harsh engine braking that unsettles the car precisely when it should be balanced.
• Fixed road position — driving the middle of the road regardless of bend direction; eliminates your sight-line advantage and forces a slower, more reactive entry.
• Treating every bend the same — a tight hairpin and a long sweeping curve demand different IPSGA applications; recognising that difference is part of reading the road well.

A little bit of practice and some real road experience and you’ll have these mistakes fixed in no time.

Cornering Changes When IPSGA Clicks

Getting the theory right is one thing. Running it smoothly through a real bend — with a limit point closing in, a damp surface, and an oncoming vehicle in the frame — is something else entirely. Luckily, that gap closes through deliberate practice and feedback.

• Use the limit point as a live speed reference on every bend, not as an abstract concept; it’s available on every road in the country, in real time, every time you drive.
• Adjust your road position before the bend begins — if you’re still repositioning as you steer, the Position phase was missed, and your sight line has already paid the price.
• Complete all braking on the straight — if you feel the need to brake while turning, something earlier in the IPSGA sequence wasn’t applied when it should have been.
• Feed acceleration in smoothly from the apex — this single action confirms that every phase before it was executed correctly; a clean exit is the payoff for a clean approach.

P.S. — If the theory lands clearly but the practice still feels rough, one session with a qualified advanced driving observer will surface more than a dozen re-reads of any article. Real feedback on real roads is where IPSGA stops being theory and starts being second nature.