Hazard Perception
Learn to recognise dangerous situations early and know how to respond safely to unexpected situations.
Hazard perception is the ability to spot dangerous situations early and anticipate them before they escalate into an accident. It is one of the most decisive skills for safe driving — and at the same time one of the hardest to learn, because danger often hides in the ordinary.
On Dutch roads there are four major categories of hazards: stopping distances (the combination of reaction time and braking distance), weather conditions (rain, slippery surfaces, fog, aquaplaning), other road users (blind spots of trucks, cyclists, pedestrians) and influences on the driver (alcohol, fatigue, distraction).
On a wet road at 80 km/h a braking manoeuvre can easily take 57 metres in total — and that is for a sober, rested driver. Alcohol effectively doubles reaction time and dramatically increases the reaction distance. Aquaplaning occurs at high speed on a wet road surface; the correct response is to gently release the accelerator, not brake.
The CBR theory exam actively tests hazard perception through images. By understanding the principles behind the correct responses — rather than memorising them — you score higher and drive more safely later.
What will you learn here?
- ✓Stopping distance = reaction distance + braking distance; at 80 km/h already over 57 metres on dry road
- ✓Aquaplaning: gently release accelerator, do not brake, steer straight — never steer abruptly
- ✓The blind spot on the right of a truck can be several lanes wide
- ✓Alcohol, fatigue and drugs increase reaction time and reduce risk awareness
- ✓Anticipating early is safer than braking late and hard
Topics
Braking and stopping distances
5 key rules
Aquaplaning
5 key rules
Blind spot at trucks
5 key rules
Alcohol, drugs and medicines
5 key rules
Practice this topic
Test your knowledge with targeted practice questions
Frequently asked questions
How long is the stopping distance at 50 km/h?
At 50 km/h the total stopping distance is approximately 28 metres — 14 metres reaction distance (at 1 second reaction time) plus 14 metres braking distance on dry tarmac. On wet road or when fatigued this is considerably more.
How do I recognise aquaplaning?
You recognise aquaplaning by a sudden light steering feel and increasing engine revs without going faster. Respond by gently releasing the accelerator and steering straight ahead — never brake or steer abruptly.
What is the alcohol limit for new drivers?
For drivers in the first five years of their licence the limit is 0.2 per mille. For experienced drivers that is 0.5 per mille. The body breaks down approximately 0.1-0.15 per mille per hour — coffee does not speed this up.
Why is the blind spot of a truck so dangerous?
The blind spot on the right of a truck can be several metres wide and up to two lanes long. If you cannot see the driver's mirrors, the driver cannot see you either. Never ride alongside a truck if it might turn right.