Types of Bends

The Three Types of Bend

Every bend you encounter on the road falls into one of three categories: constant radius, tightening, or opening. Each behaves differently and demands a different response from you. Understanding these three types transforms cornering from a reactive exercise into a planned, controlled manoeuvre.

The limit point tells you which type of bend you are dealing with in real time. A limit point that stays at the same distance means constant radius. One that is moving towards you means the bend is tightening. One that is moving away means the bend is opening. This is the practical application of limit point analysis — reading the bend type and responding accordingly.

Constant Radius Bends

A constant radius bend curves at the same rate throughout. The limit point stays at a fixed distance from you, neither approaching nor receding. These are the most predictable bends and the easiest to drive smoothly, because the steering angle and speed you set at the entry remain correct all the way through.

The technique is straightforward: complete your braking before the turn-in point, select the right gear, apply a single steering input, and maintain a steady throttle through the bend. The car stays balanced and you can focus on scanning for hazards rather than making constant speed adjustments. Motorway slip roads and purpose-built roundabouts often feature constant radius curves.

Tightening Bends

Tightening bends are the most dangerous type because they demand more from you as you progress through them. The curve gets sharper, meaning you need more steering lock and less speed the further you go in. The limit point will be moving towards you, which is your cue that conditions are getting more demanding, not less.

The critical rule with tightening bends is to set your entry speed conservatively. It is far better to enter a tightening bend slightly too slowly than slightly too fast, because you cannot safely shed speed once you are committed to the corner with significant steering lock applied. If you find the limit point continuing to come towards you mid-bend, ease off the throttle gently — never brake sharply, as this can destabilise the car.

Opening Bends

Opening bends are the most rewarding to drive well. The curve gets gentler as you progress through it, the limit point moves away from you, and you can progressively unwind the steering and apply more throttle. The car accelerates smoothly out of the bend with an increasing margin of grip.

The key discipline with opening bends is patience. Do not accelerate too early — wait until you can see the limit point clearly moving away before extending your speed. Many drivers get caught out by bends that appear to open but then tighten again, forming an S-shape. Always let the limit point confirm what the bend is doing before committing to acceleration.

Compound and Double-Apex Bends

Many real-world bends are compound — they change from one type to another partway through. A bend might open briefly before tightening, or tighten before opening. Some have a double apex, where the road curves, straightens slightly, then curves again in the same direction. These are where limit point analysis proves most valuable, because it gives you continuous feedback about what the bend is doing right now, regardless of what it was doing a moment ago.

Treat every bend as potentially compound until the limit point tells you otherwise. This mindset keeps your entry speed conservative and leaves you room to manage whatever the road throws at you. As your experience grows, you will start to recognise compound bends from the visual clues in hedgerows, road markings, and signs — but the limit point remains your ultimate confirmation of what the bend is actually doing at any given moment.