Defensive driving does not mean hesitant driving. It is a method: you observe, assess, decide and then act – in that order, and early enough to still have a choice.
The four steps
The four steps follow in order – skipping one means reacting too late.
ObserveAssessDecideAct
Observe: what is happening around me? Scan the road, the verges and the mirrors systematically.
Assess: what could this become? A ball rolling out announces a child. A stationary bus announces pedestrians.
Decide: what will I do? Slow down, move over, cover the brake – the decision comes before it becomes necessary.
Act: carry it out calmly and predictably for others.
Remember: the most common mistake is not acting badly, but observing too late. The other three steps cannot make up for that.
Reading the signs
Almost every hazard announces itself. A few signs worth learning to read:
Turned front wheels on a parked car: it may be about to pull out.
A cyclist glancing over the shoulder: they are about to move out.
Brake lights two or three vehicles ahead: the slowdown will reach you.
Reflections and shadows beneath vehicles: someone is approaching whom you cannot see yet.
A change in road surface colour: possible damp, gravel or ice.
Noticing these costs nothing – but it buys you the seconds that make the difference.
Keeping margins
Defensive driving is measured in reserves. Three margins matter most:
Margin of time: the safety distance, so that you can react.
Margin of space: the lateral clearance to cyclists, pedestrians and parked vehicles.
Margin of speed: driving slowly enough to stop within the distance you can see.
Remember: whoever has no margin left has no choice left. All of defensive driving is about keeping the choice.
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